This water bottle crossbody bag is equipped with a adjustable detachable shoulder strap. This water bottle holder bag is made of neoprene material. Neoprene is a durable and elastic material, nice for outdoor activities. It has better water resistance, shockproof while maintaining its high softness, elasticity, lightweight and comfortable. It protects your bottle from scratches and scrapes, can be cleaned repeatedly (machine washable) and never fade.