These bottle holders are constructed from 3mm Neoprene Wetsuit rubber, and will hold a longneck bottle. They are designed to keep your favourite beverage COLD and your hands WARM! The full glued in bottom means your beer won't drip on you! The neoprene construction and the zipper makes it easy to remove the bottle from the holder, no pliers needed. Its stretchable, washable and foldable.