Lightweight aluminized clothing offers excellent high temperature insulation against radiant heat. Both aluminized 15-ounce rayon and 19-ounce material includes GENTEX® exclusive five-ply Dual Mirror® construction reflecting up to 95% radiant heat keeping workers cool and comfortable. The aluminized Thermonol is better suited for applications involving molten metal and sparks. Cover boots are 12” high, lined with FR duck material and uses a zipper closure. Grip tread sole Kevlar® thread sewn to main body and reinforced with rivets. One size fits up to shoe size 13. Sold by the pair.