10 Best Memory Foam Mattresses Under 300 in 2026: Affordable Comfort, Cooling, and Pressure Relief

Shopping for a mattress on a tight budget does not mean settling for poor comfort. The best memory foam mattresses under 300 can still deliver pressure relief, decent motion isolation, and a surprising amount of everyday support.

In this roundup, we focus on practical picks for value-minded buyers, with attention to feel, thickness, cooling features, and the kind of sleepers each mattress suits best.

Best 10 Memory Foam Mattresses Under 300 Picks for 2026

Cooling Budget Pick – GAESTE 8" Cooling Gel Memory Foam

If you want memory foam mattresses under 300 that still focus on cooler sleep, this 8-inch GAESTE full-size option is a straightforward pick. The gel-infused memory foam is designed to manage heat while the medium feel aims to balance support and comfort for everyday use.

Best For: Full-size sleepers who want an affordable, medium-feel mattress with cooling features.

Pros:

• Gel-infused memory foam helps reduce heat buildup.
• Medium feel offers balanced support and pressure relief.
• CertiPUR-US foam and an OEKO-TEX certified cover add peace of mind.
• Works with most full-size bed frames, box springs, and platforms.

Cons:

• 8-inch profile is thinner than many premium mattresses.
• Requires up to 72 hours to fully expand.

For shoppers focused on value, this mattress covers the essentials without overcomplicating the decision. It is a practical choice for a primary bedroom, guest room, or any setup where cooling and affordability matter most.

Compact Support Pick – Zinus 6" Green Tea Memory Foam

For memory foam mattresses under 300, this Zinus 6-inch full mattress keeps things simple with pressure-relieving foam and a compact profile. The green tea and ActivCharcoal infusion is meant to support a fresher sleep feel, while the medium-firm build is aimed at back sleepers and average-weight sleepers.

Best For: Back sleepers, average-weight sleepers, and anyone wanting a lower-profile full mattress.

Pros:

• Pressure-relieving memory foam with green tea and ActivCharcoal infusion.
• Medium-firm feel suits back sleepers and average-weight sleepers.
• CertiPUR-US certified foam with a 10-year limited warranty.
• Lightweight 6-inch design is easier to maneuver.

Cons:

• 6-inch thickness may feel too slim for some sleepers.
• Spot-clean-only care is less convenient than a removable cover.

This model makes sense if you care more about value, support, and easy setup than a plush profile. It is a solid budget-friendly option for a spare bedroom or for sleepers who prefer a firmer, simpler feel.

Cooling Queen Value – LIFEMENT 8" Graphite Gel Memory Foam

If you are shopping for memory foam mattresses under 300 in queen size, this 8-inch LIFEMENT model is built around cooling and pressure relief. Its graphite-infused foam, open-cell design, and medium-firm support are meant to help with airflow, motion transfer, and everyday comfort.

Best For: Queen-size shoppers who want cooling features, motion control, and medium-firm support.

Pros:

• Graphite-infused foam is designed to regulate heat and wick moisture.
• Three-layer build includes base support, transition foam, and open-cell memory foam.
• Fiberglass-free design with CertiPUR-US foam and OEKO-TEX certified cover.
• Medium-firm feel works across back, side, and stomach sleeping positions.

Cons:

• Hand-wash-only care is less convenient.
• 8-inch profile may be too modest for shoppers wanting a taller mattress.

This is a balanced budget choice for a master bedroom or guest room when cooling matters as much as support. The feature set is strong for the price, especially if you want a cleaner materials profile and a little more motion isolation.

Charcoal Comfort Pick – NapQueen 8" Bamboo Charcoal Memory Foam

This full-size NapQueen mattress is a good fit if you want memory foam mattresses under 300 with a medium-firm feel and a little more layered support. Its charcoal-infused foam, high-density base, and transition layers are designed to balance cushioning, spinal alignment, and pressure relief.

Best For: Full-size sleepers who want a medium-firm mattress with charcoal-infused foam and a removable cover.

Pros:

• Charcoal-infused memory foam is paired with high-density base and transition foam.
• Medium-firm feel is positioned for all sleep types.
• CertiPUR-US foams and OEKO-TEX textiles support safer material choices.
• Removable zip cover is washable for easier upkeep.

Cons:

• May take up to 72 hours to fully expand.
• 8-inch profile may not feel substantial enough for everyone.

Overall, this mattress is a practical middle-ground option for shoppers who want more structure than a basic foam bed but still need to stay on budget. It is especially appealing if you prefer a medium-firm feel and want a washable cover.

Cooling Gel Twin Pick – Neo Sleep Twin 8 Inch Cooling Gel Memory Foam Mattress

If you’re shopping for memory foam mattresses under 300 and want a twin size option that focuses on cooling and pressure relief, the Neo Sleep 8-inch model is a practical place to start. Its gel-infused foam, breathable structure, and medium feel are designed to help reduce heat buildup while contouring to the body.

Best For: Twin beds in guest rooms, dorms, daybeds, or smaller bedrooms where cooling and easy setup matter.

Pros:

• Gel-infused memory foam and breathable construction help promote airflow and reduce heat buildup.
• Medium-feel support and high-density foam adapt to the body to help relieve pressure points.
• Removable, machine-washable cover makes it easier to keep the mattress fresh.
• CertiPUR-US foam and an OEKO-TEX cover support a safer sleep setup.

Cons:

• Twin size only, so it won’t work for buyers needing a larger mattress.
• Needs up to 72 hours after expansion to fully settle.

Overall, this is a solid budget-friendly pick for sleepers who want cooling features, a washable cover, and a straightforward mattress-in-a-box setup without paying for extras.

Balanced Full Support – EGOHOME Full Size 8 Inch Green Tea Memory Foam Mattress

For shoppers comparing memory foam mattresses under 300 in a full size, this EGOHOME 8-inch model stands out for balanced support and a cooling feel. It uses premium memory foam with green tea gel and a breathable bubble-hole structure to help keep sleep more comfortable through the night.

Best For: Full-size sleepers who want medium-firm support, cooling materials, and compatibility with all sleep positions.

Pros:

• Patented memory foam is designed to absorb and distribute body pressure evenly.
• Green tea gel and breathable airflow features help provide a cool, fresh sleep surface.
• Medium-firm feel is made to support body curves and different sleep positions.
• Stable foam structure aims to keep firmness more consistent across temperatures.

Cons:

• Hand-wash-only care is less convenient than a removable cover.
• Full size may be too small for buyers needing more room.

This is a good fit if you want a full mattress that leans supportive rather than plush, while still offering cooling features and low-motion comfort in an affordable package.

Cooling Value Full – Novilla Full 8 Inch Gel Memory Foam Mattress

If you want memory foam mattresses under 300 with a stronger cooling focus, the Novilla 8-inch full mattress is built around airflow, moisture control, and pressure relief. It adds more NanoGel for heat absorption and uses three foam layers to help limit motion transfer and support a steadier sleep surface.

Best For: Full-size sleepers who want cooling, low motion transfer, and a mattress that is easy to set up.

Pros:

• Added NanoGel is intended to improve cooling and heat absorption.
• Three foam layers help absorb noise and motion from a partner’s movement.
• Breathable knitted fabric and odor/moisture control support a fresher sleep environment.
• CertiPUR-US foams and OEKO-TEX cover certification add peace of mind.

Cons:

• Requires about 72 hours to air out and reshape after unpacking.
• Medium feel may not suit sleepers looking for a very firm or very plush bed.

As a budget-minded full-size option, this Novilla model offers a practical mix of cooling, motion isolation, and easy mattress-in-a-box setup for everyday use.

Value Pick – MLILY 8 Inch Full Green Tea Memory Foam Mattress

If you’re shopping for memory foam mattresses under 300, this 8-inch MLILY full mattress is a straightforward option with a medium-firm feel, cooling gel infusion, and a fiberglass-free build. It’s designed to balance pressure relief and support without adding a lot of bulk, which makes it a practical fit for guest rooms, smaller bedrooms, or anyone who wants a simpler all-foam setup.

Best For: Budget-minded buyers who want a medium-firm full-size memory foam mattress with cooling and a fiberglass-free design.

Pros:

• Medium-firm feel is intended to support most body types and sleep positions.
• Gel-infused foam helps dissipate heat while keeping memory foam’s contouring feel.
• Fiberglass-free FR inner cover is a safer alternative to fiberglass-based fire barriers.
• CertiPUR-US certified foam and a 10-year limited warranty add peace of mind.

Cons:

• Only 8 inches thick, so it may feel less substantial than thicker mattresses.
• Full size limits sleeping space compared with queen options.
• Hand wash care is less convenient than a removable cover.

Overall, this MLILY model is a solid entry-level memory foam mattress under 300 if you want cooling features and dependable medium-firm support in a compact profile.

Cooling Choice – Dyonery Queen 10 Inch Gel Memory Foam Mattress

For shoppers comparing memory foam mattresses under 300, this Dyonery queen mattress stands out for its cooling-focused charcoal gel foam and medium feel. It aims to combine pressure relief, back support, and temperature regulation in a standard 10-inch profile that works with most common bed bases.

Best For: Hot sleepers who want a medium-feel queen mattress with cooling foam and balanced support.

Pros:

• Gel-infused charcoal memory foam is designed to regulate temperature and dissipate heat quickly.
• Medium firmness supports spinal alignment and suits all sleeping positions.
• CertiPUR-US and Oeko-Tex Standard 100 certifications support a safer material profile.
• Compatible with box springs, slatted bases, solid foundations, adjustable beds, floors, and hospital beds.

Cons:

• Non-quality returns are not accepted after opening, which reduces flexibility.
• At 10 inches, it may not feel as plush as thicker memory foam models.
• Queen size and 56.5-pound weight make it less compact to move than smaller options.

In short, this is a well-rounded cooling mattress for buyers who want a medium feel and broad compatibility without overcomplicating the setup.

Support Upgrade – KOW 12 Inch Queen Memory Foam Mattress

If you’re narrowing down memory foam mattresses under 300 and want a fuller, more supportive profile, this KOW 12-inch queen mattress is worth a look. It uses a three-layer foam design with nano-gel memory foam on top, a breathable middle layer, and a high-flex support base to deliver medium-firm comfort with a washable removable cover.

Best For: Buyers who want a thicker queen memory foam mattress with a washable cover and strong support.

Pros:

• Three-layer construction is built to balance contouring comfort, airflow, and support.
• Removable, washable cover makes maintenance easier than with many all-foam mattresses.
• Medium-firm feel and up to 800-pound support capacity suit a wide range of sleepers.
• Made in the USA with CertiPUR-US certified foam and fiberglass-free construction.

Cons:

• 12-inch profile is bulkier than thinner budget mattress options.
• Queen size takes up more room and is heavier to handle at 59 pounds.
• Needs 24-72 hours to fully expand after unpacking.

All told, the KOW is a strong pick if you want more mattress depth and easier cleaning while staying in the memory foam mattresses under 300 search range.

How We Picked the Best Memory Foam Mattresses Under 300

For Memory Foam Mattresses Under 300, we prioritized the features that matter most when money is tight: consistent comfort, usable support, cooling-friendly materials, and better-than-average value. We also looked for models with clear firmness descriptions, recognizable foam constructions, and sizes that fit common bedrooms and guest spaces.

Because low-price mattresses can vary a lot, we favored options that offer a balanced feel rather than extreme softness or firmness. That makes them easier to recommend for everyday use.

Quick Comparison

As a group, these mattresses fall into a few practical categories. Thinner 6- to 8-inch options are usually best for kids, guest rooms, dorms, and lightweight sleepers. Thicker 10- to 12-inch models tend to feel more substantial and are often a better fit for adults who want more cushion and depth.

Cooling features such as gel memory foam, green tea, bamboo charcoal, or breathable covers can help with heat buildup, though they are not a replacement for a truly cooling hybrid mattress.

Key Buying Factors for Memory Foam Mattresses Under 300

Thickness and Support

In this price range, thickness often affects how supportive the mattress feels. A 6-inch mattress may work fine for occasional use, but 8 inches is usually the safer baseline for most adults. If you want more room for pressure relief or shared use, consider a 10-inch or 12-inch model.

Firmness and Sleep Position

Side sleepers typically do better with medium or medium-soft foam that cushions shoulders and hips. Back and stomach sleepers usually need a firmer feel to keep the spine aligned. Since feel descriptions can be subjective, checking firmness language carefully matters more than chasing buzzwords.

Cooling and Odor Control

Memory foam can trap heat, so look for gel infusion, breathable covers, or odor-reducing materials like green tea or bamboo charcoal. These features can improve comfort, especially in warmer bedrooms, though they should be viewed as comfort extras rather than hard performance guarantees.

Motion Isolation and Bed Sharing

One advantage of Memory Foam Mattresses Under 300 is that they usually isolate movement well. That makes them appealing for couples or anyone who is easily disturbed by a restless sleeper.

Who Should Buy Which Memory Foam Mattresses Under 300?

If you need an inexpensive mattress for a guest room, dorm, or child’s bed, a thinner full or twin model can be a smart choice. If you sleep on your side or want a more mature everyday mattress feel, lean toward an 8-inch or thicker option with medium firmness.

Choose a 10- or 12-inch mattress if you want the most plush-looking profile and plan to use it as your primary bed. For hot sleepers, prioritize gel or other cooling-focused materials. For the simplest budget buy, focus on stable support and a firmness level that matches your sleep style more than any extra feature.