Cooper Cooling Dual-Sided Reversible Design - One Side is Inside-Out Breathable Cooling Ice Silky Fabric, the Cooling Cover Provides Breathability, and It is Ice Cold and Silky Soft to the Touch. It Allows Warm Air to Escape While Being Replaced with Fresh, Cool Air. At the Same Time, the Shredded Memory Foam Allows Air to Circulate Smoothly within the Pillow. The Soft Knit Copper Infused Fabric Side has Many Natural Properties and Benefits That Promote a Healthy Sleep Environment and Helps to Fight Odors. Some Studies Suggest That Copper can Improve Sleep Quality and Improve Blood Circulation. The High Quality and Durable Fabric is Made to Last