Finding a supportive, comfortable mattress does not have to mean overspending. The best memory foam mattresses under 300 can still deliver pressure relief, motion isolation, and easy bed-in-a-box setup.
In this roundup, we focused on value-first models that suit different sleep preferences, room sizes, and firmness needs without pushing past a budget-friendly price point.
Best 10 Memory Foam Mattresses Under 300 Picks for 2026
Cooler Sleep Pick
- Gel-infused foam supports cooler sleep.
- Medium-firm feel suits all-position sleepers.
- Removable cover is machine washable.
Best For: Budget shoppers who want cooler medium-firm support.
Charcoal Comfort Pick
8" Full Bamboo Charcoal Memory Foam
- Charcoal-infused foam with a high-density base.
- Medium-firm feel works for back and side sleepers.
- Washable cover and bed-in-a-box setup.
Best For: Full-size buyers wanting certified materials and medium-firm support.
Cooling Value Pick
- Cooling gel foam and breathable cover.
- Medium feel with pressure relief and motion absorption.
- Fiberglass-free with CertiPUR-US and OEKO-TEX materials.
Best For: Shoppers who want cool sleep and certified materials at a value price.
Supportive Plush Pick
- 10-inch queen with gel-infused foam.
- High-density layers help absorb motion.
- CertiPUR-US certified with 10-year protection.
Best For: Couples and queen-size shoppers who want a softer, taller mattress.
Plush Value Pick
Amazon Basics 8-Inch Plush Memory Foam Full
- Plush feel with contouring memory foam
- 3 foam layers add support and durability
- CertiPUR-US and OEKO-TEX certified
Best For: Budget buyers who want a soft full-size mattress
Cooling Support Pick
EGOHOME 8-Inch Green Tea Memory Foam Full
- Medium-firm feel with pressure relief
- Gel foam and airflow design support cooling
- CertiPUR-US certified, fiberglass free, 10-year warranty
Best For: Sleepers wanting cooling support and balanced firmness
Cooling Freshness Pick
Novilla 8-Inch Gel Memory Foam Full
- Extra NanoGel aims to improve cooling
- 3 layers help reduce motion and noise
- CertiPUR-US foam and OEKO-TEX cover
Best For: Hot sleepers wanting a quiet, medium-feel full mattress
Cool Sleep Value
GAESTE 8 Inch Cooling Gel Memory Foam Mattress
- Gel-infused foam helps manage heat
- Medium feel for balanced support
- CertiPUR-US and OEKO-TEX certified materials
Best For: Shoppers wanting an affordable cooling full-size mattress
Quiet Comfort Pick
6 Inch Full Mattress with Memory Foam
- Dual-layer foam build for balanced support
- Motion transfer reduction helps light sleepers
- Breathable, washable zippered cover
Best For: Light sleepers and guest rooms needing medium-firm support
Cooling Support Upgrade
LIFEMENT 6 Inch Copper Gel Memory Foam Mattress
- 3-layer design with cooling gel foam
- Fiberglass-free with CertiPUR-US and OEKO-TEX materials
- Medium-firm feel with low motion transfer
Best For: Sleepers wanting cooling, support, and a safer-material build
Cooler Sleep Pick – 8" Queen Gel Memory Foam
If you want memory foam mattresses under 300 that focus on cooling and pressure relief, this 8-inch queen from FDW is a practical choice. Its gel-infused top layer, medium-firm feel, and dual-layer build are aimed at sleepers who want balanced support without a heavy price tag.
Best For: Back, side, and stomach sleepers who want a cooler-feeling medium-firm mattress with easy care.
Pros:
- Gel memory foam helps improve airflow and regulate temperature.
- 2-inch gel memory foam layer over a 6-inch high-density support core.
- Contouring foam cushions pressure points while supporting spinal alignment.
- Removable, machine-washable cover makes upkeep easier.
Cons:
- 8-inch profile may feel basic compared with thicker mattress options.
- Expansion can take up to 72 hours after unboxing.
This is a straightforward budget-friendly mattress for shoppers who want cooling features and medium support in a simple bed-in-a-box format.
Charcoal Comfort Pick – 8" Full Bamboo Charcoal Memory Foam
NapQueen 8 Inch Full Size Mattress, Bamboo Charcoal Memory Foam Mattress, Bed in a Box
Check Price On AmazonFor shoppers comparing memory foam mattresses under 300, this 8-inch NapQueen full-size model offers a simple medium-firm design with charcoal-infused memory foam and a high-density base. It is built to balance cushioning and support while arriving compressed in a box for easier delivery.
Best For: Full-size sleepers who want a medium-firm mattress with charcoal-infused foam and a washable cover.
Pros:
- Charcoal-infused memory foam plus high-density base foam for layered support.
- Medium-firm feel is suited to back and side sleepers.
- CertiPUR-US certified foams and OEKO-TEX Standard 100 textiles.
- Cover can be removed and washed through the zipper design.
Cons:
- Full size may not fit shoppers who actually need a queen, despite the brand name.
- Expansion may take longer in colder rooms.
This is a good pick if you want a budget-friendly full mattress with straightforward support, easy setup, and certified materials.
Cooling Value Pick – 8" Full Cooling Essential
If you’re narrowing down memory foam mattresses under 300, this Zinus full-size option stands out for cooling comfort and simple setup. The medium feel, cooling gel memory foam, and breathable cover are designed to give you pressure relief without an overly soft sink.
Best For: Full-size sleepers who want cooling comfort, motion absorption, and certified-safe materials.
Pros:
- Cooling gel memory foam helps pull heat away from the body.
- Breathable cover supports airflow through the night.
- Medium feel is designed to balance cushioning and support.
- Fiberglass-free build with CertiPUR-US foam and OEKO-TEX cover.
Cons:
- Spot-clean-only care is less convenient than a removable cover.
- Full size supports up to 500 lbs, but lighter sleepers may not need that capacity.
This is a strong value choice if you want a cooler-feeling mattress from a recognizable brand with safe-material certifications and broad frame compatibility.
Supportive Plush Pick – 10" Queen Memory Foam
Among memory foam mattresses under 300, this 10-inch Novilla queen aims for a plusher feel with stronger structure than many thinner budget beds. Its gel-infused foam, motion isolation, and reinforced edge support make it appealing if you want a softer surface without giving up practical support.
Best For: Queen-size shoppers who want a medium-plush mattress with cooling gel foam and motion control.
Pros:
- 10-inch profile provides more substantial layering than thinner budget options.
- Gel-infused foam helps with pressure relief and heat control.
- High-density foam absorbs motion, which is useful for couples.
- CertiPUR-US certified foam and a 10-year protection plan.
Cons:
- Hand-wash-only care is less convenient than a removable washable cover.
- Medium-plush feel may be softer than some sleepers prefer.
This model is a smart fit if you want a taller queen mattress with cooling features and motion isolation, especially for shared beds.
Plush Value Pick – Amazon Basics 8-Inch Plush Memory Foam Full
Amazon Basics Plush Memory Foam Mattress, Breathable, 8 Inch, Full, White/Grey, 75 x 54 x 8 inches
Check Price On AmazonIf you’re shopping for memory foam mattresses under 300, this Amazon Basics full-size option is built around a plush feel and simple, no-frills comfort. Its 3-layer foam design aims to balance softness, support, and airflow, making it a practical pick for everyday sleeping positions.
Best For: Shoppers who want a plush, pressure-relieving full mattress with breathable foam layers.
Pros:
- Plush memory foam layer conforms to different sleeping positions.
- 3-layer construction adds support, softness, and durability.
- Breathable air holes and a wavy base surface help airflow.
- CertiPUR-US Certified foam and STANDARD 100 by OEKO-TEX certification.
Cons:
- Requires up to 72 hours to fully decompress and air out.
- Plush feel may not suit buyers who prefer a firmer bed.
Overall, this mattress is a straightforward budget-friendly choice if you want soft cushioning and basic pressure relief in a full size. It focuses on comfort and safety certifications rather than extra cooling or advanced features.
Cooling Support Pick – EGOHOME 8-Inch Green Tea Memory Foam Full
Among memory foam mattresses under 300, the EGOHOME full mattress stands out for its medium-firm feel and cooling-oriented design. It uses gel-infused foam with a bubble-hole structure to promote airflow, while the layered build aims to spread pressure more evenly across the body.
Best For: Sleepers who want medium-firm support with cooling comfort and pressure relief.
Pros:
- Medium-firm feel offers balanced support for many sleep positions.
- Gel memory foam and bubble-hole structure help with cooling and airflow.
- Designed for pressure relief and reduced motion noise.
- CertiPUR-US certified and fiberglass free, with a 10-year warranty.
Cons:
- Hand wash only care instructions are less convenient.
- Cooling features may still feel subtle compared with true hybrid beds.
For buyers prioritizing support, temperature regulation, and a stable all-season feel, this model is a strong contender. It combines practical comfort features with materials and certifications that fit a value-focused mattress search.
Cooling Freshness Pick – Novilla 8-Inch Gel Memory Foam Full
If you want memory foam mattresses under 300 with a cooling focus, the Novilla full-size model leans into airflow and freshness. Its 3-layer gel memory foam build is designed to absorb heat, reduce motion transfer, and keep the sleep surface feeling soft yet supportive.
Best For: Shoppers who want a cooler-sleeping full mattress with low motion transfer.
Pros:
- Extra NanoGel is designed to improve heat absorption and airflow.
- 3 foam layers help absorb noise and vibration from movement.
- Medium feel with high-density foam supports spinal alignment.
- CertiPUR-US foams and OEKO-TEX certified cover add peace of mind.
Cons:
- Needs up to 72 hours to fully expand and air out.
- May feel too soft for sleepers who prefer a firmer mattress.
This is a solid all-around pick if you want a cooler, quieter memory foam mattress without giving up pressure relief. The emphasis on freshness and motion isolation makes it especially appealing for shared bedrooms.
Cool Sleep Value – GAESTE 8 Inch Cooling Gel Memory Foam Mattress
If you’re shopping for memory foam mattresses under 300, this GAESTE full-size option is aimed at buyers who want cooling comfort without paying for extra features they may not need. The 8-inch profile, gel-infused foam, and medium feel make it a straightforward pick for everyday use in a primary bedroom or guest room.
Best For: Budget-minded shoppers who want a medium-feel full mattress with cooling gel foam and pressure relief.
Pros:
- Gel-infused memory foam is designed to help manage heat for cooler sleep.
- Medium feel offers balanced support for shoulders, hips, and back.
- CertiPUR-US certified foam and OEKO-TEX certified cover add peace of mind.
- 8-inch mattress-in-a-box setup is simple and works with most full-size frames.
Cons:
- Only one foam layer, so it may feel simpler than multi-layer designs.
- Needs up to 72 hours to fully expand after unboxing.
Overall, this is a practical value pick if you want a cooler-feeling memory foam mattress under 300 with a balanced medium feel and easy setup.
Quiet Comfort Pick – 6 Inch Full Mattress with Memory Foam
For buyers comparing memory foam mattresses under 300, this 6-inch full mattress focuses on simple comfort, motion control, and easy handling. Its dual-layer foam build and medium-firm feel make it a sensible choice for smaller spaces, guest setups, or anyone who prefers a firmer, less plush sleep surface.
Best For: Light sleepers, guest rooms, and shoppers who want medium-firm support with motion isolation.
Pros:
- Dual-layer design combines memory foam and high-density foam for balanced support.
- Helps reduce motion transfer, which is useful for partnered sleeping.
- Breathable knit cover is zippered and machine washable for easier care.
- Light 21-pound build makes unboxing and setup easier.
Cons:
- 6-inch profile may feel thin to shoppers who want a taller mattress.
- Firmness is described as medium firm, so it may not suit those wanting a softer feel.
In short, this mattress is a no-fuss option that prioritizes support, motion isolation, and easy maintenance over extra plushness.
Cooling Support Upgrade – LIFEMENT 6 Inch Copper Gel Memory Foam Mattress
If you want memory foam mattresses under 300 with a little more emphasis on cooling and layered support, this LIFEMENT full mattress is built around that idea. The 3-layer construction, medium-firm feel, and copper cooling gel foam are aimed at sleepers who want pressure relief, airflow, and a more structured feel in a budget-friendly package.
Best For: Back, side, and stomach sleepers who want medium-firm support, cooling, and low motion transfer.
Pros:
- Cooling gel and open-cell graphite memory foam are designed to improve airflow.
- Three-layer build adds adaptive support and motion reduction.
- Fiberglass-free construction and CertiPUR-US/OEKO-TEX certifications support safer-material concerns.
- Includes a 10-year warranty for added long-term confidence.
Cons:
- 6-inch profile may not feel substantial enough for shoppers wanting a thicker mattress.
- Hand-wash-only care is less convenient than a fully machine-washable option.
For the price range, this is a strong all-around pick if you want cooling materials and layered support without moving beyond the under-$300 category.
How We Picked These Memory Foam Mattresses Under 300
We looked for mattresses that offer the strongest mix of comfort, materials, and practical ownership value at an accessible price. That means comparing foam density cues, cooling features, mattress height, firmness range, and whether the design is likely to work well for everyday use rather than just short-term guest-room duty.
Because Memory Foam Mattresses Under 300 can vary widely, we also favored options with broad appeal, reliable bed-in-a-box shipping, and sizes that fit common bedrooms and dorm setups.
Quick Comparison: What Matters Most
If you want the easiest decision, start with sleep feel and height. Eight-inch models usually make the best all-around value, while 10-inch options can feel a little plusher and more substantial. Cooling gel, bamboo charcoal, and breathable covers may help with heat retention, though they are not a substitute for a naturally cool sleeping environment.
For couples or light sleepers, motion isolation matters more than bounce. For side sleepers, pressure relief and a softer top layer matter more than a very firm build. For back or stomach sleepers, a medium-firm feel often offers better alignment.
Key Buying Factors for Memory Foam Mattresses Under 300
Firmness and Sleep Position
Choose medium or medium-firm if you want the safest all-around option. Softer builds may suit side sleepers, while firmer support tends to work better for stomach sleepers and people who want more lift.
Thickness and Support
Six-inch mattresses are often best for guest rooms, kids’ rooms, or lightweight sleepers. Eight-inch models usually strike the best balance of comfort and affordability. A 10-inch mattress can provide a more substantial feel, but only if the foam quality is still solid.
Cooling and Freshness
Look for gel infusion, bamboo charcoal, copper, or breathable covers if heat buildup is a concern. These features can improve comfort, especially in smaller rooms or warmer climates.
Size and Bed Frame Fit
Make sure the mattress dimensions match your frame and space. Full size is a smart budget pick for solo sleepers and smaller rooms, while queen size gives more room to stretch out without jumping too far in price.
Who Should Buy Which Memory Foam Mattresses Under 300?
If you want the most versatile choice, go with an 8-inch medium-feel mattress. If you sleep hot, prioritize cooling gel or breathable materials. If you need the lowest possible price, a 6-inch model can still be a practical solution. And if you want a little extra cushioning, a 10-inch option may be worth the small upgrade.
Overall, the best Memory Foam Mattresses Under 300 are the ones that match your sleep position, room size, and comfort expectations. Focus on the feel you need first, then choose the features that support it.