Nitrile rubber (NBR) plus polyester components. Durable with good insulating qualities. 3 1/2" zipper for easy accessibility. 14 3/4" H x 6" W View our full assortment of products on our websites: www.Neighborhoodies.com | www.NeighborhoodiesPromos.com. Can’t find what you need? Let us know! We’ll be happy to source products for your project.