GUC Mushroom color From website: PRODUCT DETAILS collapse Woven of 40% cotton, 40% modal and 20% polyester. By choosing our cotton products, you’re supporting our investment in Better Cotton’s mission. This product is sourced via mass balance and therefore may not contain Better Cotton. Learn more at bettercotton.org/massbalance. Reverses to same. Zipper closure. Accommodates a 22" square insert. Machine wash. Imported. Machine wash cold; gentle cycle. Use only non-chlorine bleach when needed. Tumble dry low; remove promptly. Do not iron. Overall: 22" sq Zipper: 21" l