8 x 6 x 4 1/4" Insulated Foam Container. Maintains the insulation and integrity of your products that present temperature constraints. Economical Shippers are light-weight, reusable and recyclable! Thick, molded foam container protects contents from crushing and breakage. Made from thick, 1 1/2" polystyrene foam. Use with refrigerants such as Cold Packs.