The outer silver reflects the sun while the black on the inside blocks sunlight
Both materials are UV coated (ultra-violet) which helps protect against sun damage, thus giving longer tarp life
Extra heavy duty fabric with rust proof every 18" around the hem
All 4 corners feature molded plastic reinforced corners
For bale anchoring, simply lace poly rope through grommets around pipe circling the perimeter of the stack
Also works great as a pool cover & RV cover.