Technology and performance were top of mind when designing our Original Performance Mattress Pad. Starting from the surface, we combined our breathable, moisture-wicking Original Performance fabric with hypoallergenic CoolX fiber fill technology to keep you cool and to complement the other layers of your cooling Sheex Performance Sleep System. The unique shape of the hollow CoolX technical fibers prevents heat from accumulating in the material surrounding the body. This technology is designed to keep you cool and dry throughout the night by pulling moisture away from your body and enhancing moisture evaporation. Cool comfort for better sleep. Let Sheex own the night, so you can own your day. Features: Sheex performance Sleep | Comfort can not be compromised Mattress Pad's surface is made from the same silky-smooth, moisture-wicking fabric as our Original Performance sheets Jump-quilt pattern on pad surface Mesh skirt stretches to fit up to 18" deep Ultimate combination of cool, breathable surface and CoolX fiber fill keeps you cool and comfortable Down Alternative Mattress Pad with 12oz hypoallergenic CoolX Fiber Fill/Sq. Yard Outer Surface: 87% Polyester/13% Spandex CoolX Fiber Fill: 100% Hypoallergenic Polyester Imported Dimensions: Twin/TwinXL 39" W x 80" L x 18" D Care: Large Capacity Washer & Dryer Recommended. Machine Wash Cold Separately. Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Sheex Elevated Performance Mattress Pad - Twin/TwinXL - Bright White