18 oz. vinyl and high density cross-linked polyethylene foam.

Code #1203, 4' x 6' x 1 1/4" (folding)
Code #1205, 4' x 8' x 1 1/4" (folding)
Code #1207, 5' x 8' x 1 1/4" (folding)
Code #1209, 5' x 10' x 1 1/4" (folding)