These mesh liners from Breathable Baby are 100% polyester and machine washable. Designed to reduce the risk of suffocation, entanglement and climbing the mesh liners are padded keeping little limbs safely inside the crib. Adjustable to fit standard 4-sided slatted cribs, solid front & Solid end cribs, the package contains 1 short panel for front railing and a long panel for wrapping the other 3 panels of the crib (both 11? high) attaches easily with hook and loop fasteners so no dangerous ties is present. Designed with solid colours to match any bedding set, this is an award winning product.