Our 6 x 3 x 18 2Mil Ice Bags Made of extra strength heavy gauge Metallocene Low Density Polyethylene (LDPE) film that meets FDA/USDA specifications. This special poly film retains flexibility at low temperatures to reduce breakage. Tubular construction with a durable bottom seal, make these bags the best ice bags on the market. Side gussets expand easily to accommodate fast loading. Can be heat sealed, tied, stapled or taped shut.