REFLECT-A-MESH is the Perfect Sun Shade in any application where air flow is required. .... Lightweight, with superior reflectability, REFLECT-A-MESH reflects the sun's rays back into the atmosphere, while allowing air flow to pass through it, WITHOUT absorbing heat. Made of 50% Aluminum andd 50% woven polyethylene, it will not run or unravel. Brass grommets every 12 inches on center, for EXTRA strength. Compact and light weight.....