Closed cell soft, stretchy and buoyant material, superior to craft foams. Available in a range of vivid colors. Can be glued with adhesive spray in layers or to the HD blocks. Perfect for use with River Road Foam Body Cutters. Made in the UK. Package includes 4 sheets that measure 2 1/2" x 4" 1.5mm - 2.5mm Thickness may vary due to engineering tolerances.