Set of hdpe inserts that lets the sled breath without letting snow in to your clutches. These have NO MESH AND ARE NOT ABS! We were the first company to develop the abs/phipher mesh vent that have become the indusrty standard for vents, however the foot well of a sled is the one place ABS AND MESH DOES NOT BELONG, that is why our footwell block offs are hdpe with no mesh.