SMx VenTECH Technology provides more support, better fit and enhanced performance; Heavy-duty, reinforced stainless steel roller buckle and center D-rings are secure, long lasting and won't rust; Heavy-duty webbing with reinforced nylon stitching ensures durability; Ventilated waffle-patterned, non-slip neoprene holds saddles in place without over-tightening; Quality neoprene won't harbor bacteria and peels away for easy cleaning