
DOWNCOOL
DOWNCOOL 3 Inch King Mattress Topper, Breathable Bamboo Viscose Air Layer
Disclosure: We may earn a commission when you buy through links on this page, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Learn more
Highlights
- Cooling Bamboo Viscose Top with 3D Air Layer: Made of 39% bamboo viscose and 61% polyester, the bamboo mattress topper surface features a 3D air layer design that enhances breathability, making it a great choice for hot sleepers.
- Plush Pillow Top for Pressure Relief: Made with a thin gel memory foam layer and a blend of 70% memory foam and 30% 3D polyester fiber, this 3 inch memory foam mattress topper delivers plush comfort with balanced support to help relieve pressure on the back, shoulders, and hips.
- Secure Deep Pocket Design: The elastic deep pocket skirt wraps around the mattress for a secure 360° fit. It stays in place on mattresses from 8–21 inches thick and won’t move or slide, even if you toss and turn at night.
- Easy Care & Maintenance: After unpacking, place the product in a well-ventilated area for 24–48 hours to allow it to fully expand, regain its original shape and loft, and naturally release any packaging odors. For daily care, spot clean with a damp cloth and mild detergent as needed, then allow it to air dry completely to help maintain its softness and shape.
- Oeko-Tex Certified & Satisfaction Guarantee: The cooling mattress topper is made from OEKO-TEX certified materials that meet strict safety and environmental standards. Free from harmful substances, it offers long-lasting comfort and peace of mind. If you have any questions, feel free to contact us.
Why You'll Love It
- Adds 3 inches of combined memory foam and fiber fill to cushion pressure points
- Breathable 3D air layer top fabric helps hot sleepers stay cool at night
- Deep elastic pocket skirt grips mattresses from 8 to 21 inches thick
- Certified by OEKO-TEX to ensure materials are free from harmful substances
- Gel-infused foam layer pairs with polyester fiber for balanced contouring support
Pros
- +Fits deep mattresses up to 21 inches
- +OEKO-TEX certified materials
- +Cooling bamboo viscose surface
- +Secure 360-degree skirt prevents shifting
Cons
- -Spot clean only, not machine washable
- -Requires 24-48 hours to fully expand
Detailed Review
The DOWNCOOL 3 Inch King Mattress Topper upgrades an existing bed by adding plush cushioning and heat-dissipating airflow. It suits anyone looking to soften a firm surface or relieve joint pressure without replacing their entire king mattress.
The topper relies on a multi-layer design to deliver both comfort and temperature regulation. Its pillow top surface is woven from 39 percent bamboo viscose and 61 percent polyester, featuring a 3D air layer designed to improve breathability for hot sleepers. Beneath the cover, a thin gel memory foam layer works alongside a blend of 70 percent memory foam and 30 percent 3D polyester fiber to cushion the shoulders, hips, and back.
To prevent shifting during sleep, the unit features an elastic deep pocket skirt that wraps 360 degrees around mattresses between 8 and 21 inches thick. This keeps the pad firmly anchored even if you move frequently throughout the night.
Upkeep requires some patience, as the topper must be spot cleaned with mild detergent and allowed to air dry rather than tossed in a washing machine. You will also need to wait 24 to 48 hours after unboxing for the compressed materials to fully expand, regain their loft, and release any lingering packaging scent.
Verdict: This king topper is a practical choice for sleepers who want pressure-relieving foam comfort paired with a breathable bamboo surface. It is especially suitable for deep mattresses that struggle to hold standard fitted pads in place.
Specifications
- Size: King
- Thickness: 3 inches
- Cover Materials: 39% bamboo viscose, 61% polyester
- Filling: Thin gel memory foam, 70% memory foam, 30% 3D polyester fiber
- Pocket Depth Compatibility: 8 to 21 inches
- Safety Certification: OEKO-TEX certified
Who Should Buy It
A great fit if you:
- Sleep hot and want a breathable 3D air layer surface
- Need extra cushioning for your hips, back, and shoulders
- Own a thick mattress up to 21 inches that needs a secure fitted skirt
- Prefer bedding made with OEKO-TEX certified components
Consider something else if you:
- Want a topper with a removable, fully machine-washable cover
- Need to use your mattress topper immediately without waiting for expansion
FAQ
What mattress depths will this topper fit?
The elastic skirt wraps around mattresses ranging from 8 to 21 inches thick for a 360-degree secure hold.
How do you clean the topper?
Spot clean any soiled areas using a damp cloth and mild detergent, then let it air dry completely to preserve its shape and softness.
How long does it take to expand after unpacking?
Leave the topper in a well-ventilated space for 24 to 48 hours so it can reach its full shape, restore its loft, and air out packaging odors.
Product Details
| Brand | DOWNCOOL |
| ASIN | B0HG986QYQ |






