10 Best Memory Foam Mattresses Under 300 in 2026 for Comfort, Cooling, and Value

Shopping for a comfortable mattress on a budget does not mean settling for poor support or sweaty nights. The best memory foam mattresses under 300 can still offer pressure relief, motion isolation, and a bed-in-a-box setup that is easy to handle.

Use this roundup to narrow down the options by size, firmness, cooling features, and overall value so you can choose a mattress that fits both your sleep style and your budget.

Best 10 Memory Foam Mattresses Under 300 Picks for 2026

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

If you want memory foam mattresses under 300 that lean cool and easy to maintain, this 8-inch twin is built around gel-infused foam and a breathable structure. It aims to reduce heat buildup while still giving the body-contouring feel many shoppers want in a compact bed-in-a-box.

Best For: Twin-size sleepers in dorms, guest rooms, daybeds, or smaller bedrooms who want cooling memory foam with simple care.

Pros:

• Gel-infused memory foam and breathable design help promote airflow and reduce heat buildup.
• Removable, machine-washable cover makes cleanup straightforward.
• Medium feel with high-density foam offers pressure relief and spinal alignment support.
• CertiPUR-US certified foam and OEKO-TEX certified cover support a safer materials profile.

Cons:

• Twin size only, so it is not a fit if you need a full or larger mattress.
• Needs up to 72 hours after expansion before it fully settles.

For a budget-friendly cooling option, this Neo Sleep model covers the basics well: breathable comfort, washable upkeep, and medium support. It is a practical pick if you need a simple mattress for a smaller room and want memory foam without extra fuss.

Fresh-Foam Budget Pick – Zinus 6 Inch Full Green Tea Memory Foam Mattress

Among memory foam mattresses under 300, this 6-inch full model is a straightforward choice for sleepers who prefer a medium firm feel and a slimmer profile. The green tea and ActivCharcoal infusion is designed to help keep the mattress feeling fresher, while the pressure-relieving foam layers provide basic contouring and support.

Best For: Back sleepers, average-weight sleepers, and anyone wanting a simple full-size mattress with a freshness-focused foam blend.

Pros:

• Green tea and ActivCharcoal infusion is intended to support a fresher sleep surface.
• 1 inch memory foam over 5 inches of high-density base foam provides pressure-relieving support.
• CertiPUR-US certified foam and a 10-year limited warranty add confidence.
• Ships compressed in a box for easier setup in the bedroom.

Cons:

• 6-inch profile is thinner than many full-size alternatives.
• Best fit is noted for back sleepers and average-weight sleepers, so it may feel limited for others.

This Zinus mattress is a sensible pick if you want an affordable full-size option with a medium firm feel and low-profile design. It focuses more on dependable support and freshness than on plush cushioning, which makes it easy to recommend for straightforward everyday use.

Cooling Full-Size Pick – PayLessHere 8 Inch Full Gel Memory Foam Mattress

If you are comparing memory foam mattresses under 300 in a full size, this 8-inch PayLessHere model is built around gel foam comfort and airflow-focused construction. The medium-firm feel, knit cover, and two-layer foam system aim to balance support, cooling, and easy bed-in-a-box setup.

Best For: Full-size shoppers who want a medium-firm gel memory foam mattress with breathable comfort and broad frame compatibility.

Pros:

• 2 inches of gel memory foam over 6 inches of base foam creates a balanced medium-firm feel.
• Airflow channels and breathable materials are designed to improve ventilation.
• CertiPUR-US certified foam is free of harmful substances such as formaldehyde and mercury.
• Works with many frame types, including slatted bases, floors, and adjustable beds.

Cons:

• The product notes list a continuous coil detail, which may be confusing for shoppers expecting an all-foam spec sheet.
• Requires up to 72 hours to fully vent and shape after unpacking.

Overall, this is a practical full-size pick for shoppers who want a cooler-feeling memory foam mattress without moving far up in price. It combines easy setup, certified foam, and a medium-firm profile that should suit many everyday bedrooms.

All-Position Support Pick – EGOHOME Full 8 Inch Green Tea Memory Foam Mattress

For shoppers looking at memory foam mattresses under 300, this EGOHOME full-size option focuses on pressure relief, cooling, and stable support across sleep positions. Its green tea gel infusion and bubble-hole structure are designed to improve airflow while the medium-firm feel aims to keep the body supported through the night.

Best For: Full-size sleepers who want pressure relief, temperature regulation, and support that works across different sleeping positions.

Pros:

• Patented premium memory foam is designed to absorb and distribute body pressure evenly.
• Bubble-hole structure and green tea gel help promote breathability and a cooler sleep feel.
• Medium-firm support is intended to work well for different sleep positions.
• High 750-pound weight capacity and 10-year warranty add durability-minded appeal.

Cons:

• Hand wash only care may be less convenient than a removable, washable cover.
• The title and details suggest a full-size mattress, so it is not for shoppers needing larger sizes.

This EGOHOME mattress stands out if you want a full-size bed that emphasizes pressure relief without losing the cooling focus. It is a strong everyday option for people who change positions at night and want a stable, all-around foam feel.

Cooling Plush Pick – Lazyzizi Queen 12" Fiberglass-Free Memory Foam Mattress

If you’re shopping for memory foam mattresses under 300, this Lazyzizi queen model stands out for its 12-inch plush build, gel-infused foam, and fiberglass-free construction. It aims to balance pressure relief, motion isolation, and temperature control, making it a practical pick for buyers who want a softer feel without giving up support.

Best For: Adult or family sleepers who want a plush queen mattress with cooling foam and low motion transfer.

Pros:

• 12-inch, 4-layer foam design for a cushioned, supportive feel
• Gel-infused and airflow foam help with heat management
• Fiberglass-free and OEKO-TEX certified for a safer sleep setup
• 35D high-density foam is designed to reduce sagging and motion transfer

Cons:

• Plush feel may be too soft for shoppers who prefer a firmer mattress
• Queen size only, so it won’t fit smaller bed frames

Overall, this is a strong choice if you want a thicker memory foam mattress under 300 with cooling features and a softer comfort profile. It is especially appealing for shared beds where motion isolation matters.

Budget Full-Size Pick – NapQueen 8" Charcoal Memory Foam Mattress

For buyers comparing memory foam mattresses under 300, this NapQueen full-size option keeps things straightforward with an 8-inch medium-firm build and charcoal-infused foam. It is designed for balanced comfort and support, and the bed-in-a-box format makes it easier to handle and set up.

Best For: Full-size bed owners who want a medium-firm, easy-to-unbox memory foam mattress with a washable cover.

Pros:

• Medium-firm feel suits a range of sleep positions
• Charcoal-infused memory foam with a high-density base for support
• CertiPUR-US foams and OEKO-TEX textiles add peace of mind
• Zip-off cover can be washed for easier maintenance

Cons:

• Full size may be too small for shoppers needing a queen mattress
• At 8 inches thick, it may feel less substantial than taller options
• Expansion can take up to 72 hours after unboxing

This is a practical value choice if you want a simple medium-firm mattress with verified materials and no-fuss setup. It makes the most sense for full-size sleepers who prioritize support and convenience over a taller profile.

Balanced Cooling Pick – FDW 8" Queen Gel Memory Foam Mattress

Among memory foam mattresses under 300, this FDW queen mattress is built for shoppers who want cooler sleep and medium support in an 8-inch profile. Its gel memory foam top layer, high-density base foam, and removable cover make it a straightforward option for everyday use.

Best For: Queen-size sleepers who want a medium-firm gel memory foam mattress with easy care and a cooler feel.

Pros:

• Gel-infused memory foam is designed to improve airflow and temperature regulation
• 2-inch comfort layer over a 6-inch support core for balanced cushioning
• Removable, machine-washable cover simplifies upkeep
• CertiPUR-US certified for a cleaner materials profile

Cons:

• 8-inch thickness may not feel as plush as thicker mattresses
• Medium firmness may be less ideal for shoppers seeking a very soft bed
• Queen size only, so it is not a fit for smaller mattress needs

This model is a solid pick if you want a cooler-feeling mattress with a reliable medium feel and simple maintenance. It fits best in bedrooms where easy setup and everyday comfort matter more than a premium thick-profile design.

Budget Green Tea Foam – Best Price Mattress Full 6 Inch Green Tea Memory Foam

If you’re shopping for memory foam mattresses under 300, this 6-inch full-size option focuses on the basics: pressure relief, balanced support, and a fresher feel from green tea infusion. Its medium firmness and three-layer build make it a practical pick for smaller rooms, guest spaces, or anyone who wants an affordable memory foam mattress without extra frills.

Best For: Budget-minded shoppers needing a compact full mattress for guest rooms, kids’ rooms, or simple everyday use.

Pros:

• Memory foam molds to the body to help relieve pressure points.
• Green tea infusion is designed to help keep the mattress feeling fresh.
• Three-layer construction combines memory foam, support foam, and high-density foam for balanced support.
• CertiPUR-US certified foams and a 10-year warranty add peace of mind.

Cons:

• 6-inch profile is thinner than many standard mattresses.
• Full size may be limiting for couples or taller sleepers.
• Hand-wash-only care is less convenient than a removable washable cover.

This is a straightforward value mattress that emphasizes comfort and support over premium extras. For a low-cost memory foam mattress under 300, it makes sense if you want a simple full-size bed with certified foams and a familiar medium feel.

Cool Budget Queen – GAESTE Queen 8 Inch Cooling Gel Memory Foam

For shoppers comparing memory foam mattresses under 300, this 8-inch queen aims to deliver cooling comfort without pushing the budget. The gel-infused memory foam is built for heat management, while the medium feel and pressure-relieving design make it a sensible everyday choice for primary bedrooms, guest rooms, or platforms and box springs.

Best For: Budget queen buyers who want cooling gel memory foam with a balanced medium feel.

Pros:

• Gel-infused memory foam is designed to help manage heat for cooler sleep.
• Medium firmness supports shoulders, hips, and back with pressure relief.
• CertiPUR-US certified foam and OEKO-TEX certified cover support safer materials.
• Machine-washable cover and compressed-in-a-box delivery make setup easier.

Cons:

• 8-inch profile may feel modest compared with thicker queen mattresses.
• Needs up to 72 hours to fully expand after opening.
• Single-layer build may offer less complexity than multi-layer designs.

This model is a strong fit if cooling and simple setup matter more than a plush, thick profile. Among memory foam mattresses under 300, it stands out for offering queen size, washable cover convenience, and a medium feel at an accessible price point.

Cooling Support Pick – Dyonery Queen 10 Inch Gel Memory Foam

If you want one of the more feature-rich memory foam mattresses under 300, this 10-inch queen brings together cooling, contouring, and stronger support. The gel-infused charcoal memory foam is designed to regulate temperature and relieve pressure, while the medium-firm feel aims to suit a wide range of sleep positions.

Best For: Sleepers who want a taller queen mattress with cooling foam and balanced medium-firm support.

Pros:

• Gel-infused charcoal memory foam is designed to dissipate heat and help keep sleep cooler.
• Medium-firm feel supports spinal alignment and suits multiple sleep positions.
• Five-layer construction adds breathable, durable, low-motion-transfer support.
• CertiPUR-US and OEKO-TEX Standard 100 certifications, plus a 10-year limited warranty.

Cons:

• Return policy notes non-quality related returns after opening are not accepted.
• At 56.5 pounds, it is heavier than some budget foam mattresses.
• Designed as a standard mattress without removable cover details.

This is a compelling pick if you want more structure and thickness than many low-cost foam beds provide. For memory foam mattresses under 300, it offers a strong mix of cooling features, medium-firm support, and a 10-inch profile that feels more substantial.

How We Picked the Best Memory Foam Mattresses Under 300

For this roundup of Memory Foam Mattresses Under 300, we focused on the features budget shoppers care about most: overall comfort, support level, cooling materials, certifications, and construction details that suggest better durability. We also looked for models that cover common bed sizes and sleep preferences, from softer pressure relief to firmer all-around support.

Quick Comparison

In this price range, the biggest differences usually come down to thickness, firmness, and cooling design. Thinner 6-inch models are often best for lightweight sleepers, guest rooms, or kids’ beds, while 8-inch and 10-inch options generally provide more cushioning and better long-term comfort. If you sleep hot, look for gel, bamboo charcoal, or cooling covers. If you want a cleaner material story, certifications like CertiPUR-US and fiberglass-free construction matter.

Key Buying Factors for Memory Foam Mattresses Under 300

Firmness and Sleep Position

Side sleepers usually need a mattress with enough give to cushion shoulders and hips. Back and stomach sleepers often do better with a medium-firm feel that keeps the spine aligned. If you are unsure, medium or medium-firm is usually the safest starting point.

Thickness and Support

For Memory Foam Mattresses Under 300, thickness affects both comfort and perceived quality. A 6-inch mattress may be fine for lighter sleepers or occasional use, but an 8-inch or 10-inch model often feels more stable for everyday sleeping. Taller profiles can also help reduce bottoming out.

Cooling Features

Memory foam can trap heat, so cooling gel, breathable covers, and charcoal or green tea infusions can help improve airflow and temperature control. These features are helpful if you sleep warm, live in a hot climate, or simply want a less “stuck-in-the-mattress” feel.

Materials and Certifications

Look for CertiPUR-US certification when possible, since it indicates the foam has been tested for certain harmful chemicals and emissions. Fiberglass-free designs are also worth prioritizing for peace of mind. When a mattress includes extra material claims, check that they are backed by clear product details rather than marketing language alone.

Who Should Buy Which Memory Foam Mattresses Under 300?

Choose a thinner, budget-friendly model if you need an affordable option for a guest room, dorm, or child’s bed. Pick a medium-firm 8-inch or 10-inch mattress if you want a better everyday sleep surface with a more balanced feel. If heat is your main concern, focus on cooling gel or breathable infusion layers. If safety and simplicity matter most, narrow your search to certified, fiberglass-free Memory Foam Mattresses Under 300.

In short, the best choice is the one that matches your body, your room, and how you actually sleep. That is the fastest way to get real value from a budget mattress without overpaying for features you will not use.