Snap-On Felt Glides are designed to provide long lasting protection on your classroom, daycare and home surfaces from wear and tear. Constructed with durable polypropylene and high-quality white felt to protect surfaces like hardwood, concrete, tile, linoleum and more. These glides also help reduce sound from chairs for a better learning environment. Easily snap onto chair glides without the use of tools. Felt caps are designed for chairs with swivel glides; pairs great with School Stack Chairs with swivel glides in all sizes (sold separately).