Defender Funny Face Fly Masks Exclusive fun designs put a little humor into fly protection. New Improved Fit with soft nylon crown cap and ears. Durable grey mesh provides protection from pests and harmful UV rays. Features: single secure velcro closure to ensure the mask stays securely in place and fleece binding for added comfort. Nylon Material Cap Grey UV Mesh Single Secure Velcro Closure Poly Fleece Binding Specifications: Size: Small (500-800lbs) Med Pony/Lrg Pony/Cob Medium (800-1100lbs) Average Horse Large (1100-1600lbs) Warmblood/Large Horse