The Equiline multilayer Soundproof Ear Bonnet, featuring the SLE technology, helps your horse stay focused and avoid any disctraction by minimizing any outside noises. The SLE technology is made of 3 layers: allergy-free cotton with a special antibacterial treatment are the bottom and top laters, with the technical soundproof material make up the middle layer. The technology behind the DAVE Equiline soundless ear net results in a more comfortable and concentrated horse for high level performance.