Construction Made of 53% Linen and 47% Cotton. Crafted from 100% polyester, the blackout liner prevents most light from entering windows to help darken the room. STANDARD 100 by OEKO-TEX® Certified: WSI Certificate #: 14.HUS.42449: tested for 350+ harmful substances to keep you and your family safe from chemicals common to textile manufacturing. By choosing our cotton products, you’re supporting our investment in Better Cotton’s mission. This product is sourced via mass balance and therefore…