Add contouring comfort with a cooling gel memory foam mattress topper. Choose 2 inches for a lighter cushion or 3 inches for deeper cushioning, in seven sizes including Twin XL and Short Queen.
Select your size, thickness and trial option to see the current price. For camper and bunk sizes, explore our RV mattress toppers.
Add a layer of contouring comfort with the Alexa Sleep Cooling Gel Mattress Topper. Gel-infused memory foam cushions your body, while your mattress underneath provides the support.
Choose your size, thickness and trial option above to see the current price.
| Profile | Feel | Choose it when |
|---|---|---|
| 2 inches | A lighter layer of cushioning | You want to soften the surface while keeping more of your mattress’s existing feel. |
| 3 inches | A deeper layer of contouring foam | You prefer more cushioning and a greater change in surface feel. |
Thickness is not a firmness rating. Your mattress, body and sleeping position all affect the final feel. Read our cooling mattress topper buying guide for more help choosing.
Measure the flat sleeping surface from edge to edge. Match the width and length below rather than relying on the bed’s name alone.
| Size | Dimensions |
|---|---|
| Twin | 38 × 75 |
| Twin XL | 38 × 80 |
| Full | 54 × 75 |
| Queen | 60 × 80 |
| Short Queen | 60 × 75 |
| King | 76 × 80 |
| Cal King | 72 × 84 |
Shopping for a camper or bunk? Compare our RV mattress topper sizes. Allow for the extra topper height when checking fitted sheets, protectors and overhead clearance.
This topper combines memory foam with cooling gel. It is designed for a comfortable sleep surface, but it is not actively refrigerated and does not lower your room temperature. A cool initial feel does not mean the foam will remain cold all night.
Your bedding, mattress airflow and room temperature also matter. A breathable fitted sheet and protector can help you avoid adding unnecessary heat-trapping layers. Compare gel vs. memory foam toppers to understand the materials.
A topper can soften a mattress that feels too firm, add cushioning to a guest bed or change the feel of a dorm mattress. It cannot repair sagging, broken springs or an uneven foundation. Address those problems before adding a comfort layer.
Place the topper flat on the mattress and cover it with a fitted sheet that accommodates the combined height. It can be used with a compatible mattress on an adjustable base; check the mattress and base instructions for your setup.
Follow the care instructions supplied with your topper. Use a suitable protector to help keep the foam clean, and do not machine wash or tumble dry the foam.
The selector offers None or 30 Nights under Trial Period. Select the option you want before adding the topper to your cart, and review the return and trial terms before ordering. A trial should not be assumed to be included with every option.
Explore all mattress toppers or complete your setup with a pillow that suits your preferred feel.
It is a separate layer of gel-infused memory foam that sits on top of your mattress. The foam adds contouring cushioning; the mattress beneath it still provides support.
Choose 2 inches for a lighter comfort change or 3 inches for a deeper cushioning layer. Neither thickness repairs an unsupportive mattress. Your preferred feel and existing mattress should guide the choice.
No topper can promise to remain cold all night. Cooling gel does not refrigerate the bed. Room temperature, mattress airflow, sheets and protectors all affect how warm the sleep surface feels.
Twin 38 × 75, Twin XL 38 × 80, Full 54 × 75, Queen 60 × 80, Short Queen 60 × 75, King 76 × 80 and Cal King 72 × 84 inches. Measure your mattress before choosing.
Yes, when the topper dimensions match a flat, supportive RV mattress. RV names and dimensions vary, so measure the sleeping surface and check our separate RV Mattress Toppers product for additional sizes.
No. A topper changes surface comfort but cannot repair sagging, broken springs or an uneven base. It works best on a mattress that is still flat and supportive.
The product selector offers None and 30 Nights under Trial Period. Choose the option you want and review the return and trial terms before purchase; do not assume every selection includes a trial.
Follow the care instructions supplied with your topper and protect it with suitable bedding. Do not machine wash or tumble dry the foam.
Cooling Gel Mattress Topper 
This topper was easy to add to my existing mattress and gave it a more comfortable surface. The 2-inch profile works well for me because it adds cushioning without feeling excessively thick.
I prefer a softer sleeping surface, and the 3-inch option gives my mattress noticeably more cushioning. The foam has a comfortable feel and helps make the bed feel more inviting at night.
The 2-inch topper added a comfortable cushion without changing the feel of my mattress too much. It feels soft when I sleep on my side and supportive enough when I turn onto my back.
