Sea To Summit expander liner

The Expander Liner is made from a high-quality stretch cotton/polyester blend that is more comfortable and warmer than standard cotton fabrics. The stretch properties of the Expander fabric provide ample freedom of movement, allowing for undisturbed sleep. Additionally, the fabric is treated with an antimicrobial treatment that prevents the formation of unpleasant body odors. This durable treatment does not use nano-particles and can be washed countless times. It has been approved by the US Environmental Protection Agency (EPA) and is used in bed linens in many hospitals, among other applications.