Aluminized Norbest 918™ Chaps Made of Norbest 918™ fabric with carbon and Kevlar®, these aluminized Chaps feature leather flaps over the feet and a leather strap at the waist for fastening. The aluminization provides 95% reflectivity to radiant heat for protection up to 2950 degree F. Length is measured from the waist and is not an inseam length.