Our No Wind Pro Fleece Frost Liner(TM) provides extraordinary warmth and wind protection while fitting comfortably underneath a helmet. The ears of the Frost Liner(TM) as are constructed from a specialized fabric comprised of two layers of Micro Fleece laminated together with a patented windproof membrane. The crown features a flat seamed, stretch fabric, allowing for the perfect fit regardless of size. Fabric Type: Comfort Shell(TM) UV Performance Fabric Fabric Content: 92% Polyester/8% Spandex Lining Type: Ears lined with PolartecA(R) WindblocA(R) Fleece Lining Content: 100% Polyester (82% Recycled) Fit Type: Fitted Weight: 2.5 oz