Overland Vehicle Systems TMBK Roof top tents are made from the finest materials. Starting out with heavy aluminum plated base assembled using marine-grade stainless steel hinged and hardware! Features an 81” square sliding ladder with steel hinges! OVS Roof Top Tents are 4 seasons ready! Constructed using 600D Heavy Duty Poly Cotton Rip-Stop Canvas bodies that are built to stand the test of time through the harshest of conditions you can put yourself in. The Rain Flys are made of a 420D Heavy Duty Polyester Oxford Waterproof Material to protect you and your family from the rain and snow!