When you are looking to get the most out of the heating and cooling function for your seats some materials will work better than others. Coverking recommends the spacer mesh due to its porous design it offers little restriction for those features. Thicker materials such as neoprene, neosupreme, rhinohide, leatherette and saddle blanket will eventually transfer heat but not as quickly as a ballistic, polycotton-drill, velour, snuggleplush or alcantara.