Blend of Ethylene-vinyl acetate (EVA) & Natural Cork Highly durable and lightweight material Cell Structure-Closed Cell Durometer- 60/63 Moldable & Grindable Heating Temp -250 -300 degree F, Heating Time-1-3 minutes Soletech cork is a blend of Ethylene-vinyl acetate (EVA) & Natural Cork. Providing a highly durable and lightweight material. Available in 1/16", 1/8", 1/4", 3/8" and 1/2". Heating Temp -250 -300 degree F Heating Time-1-3 minutes Moldable & Grindable Cell Structure-Closed Cell Durometer- 60/63