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