Made of premium and durable 900 denier waterproof oxford fabric and hydration bladder is made of EVA. Designed specifically for road cycling /running/ hiking so that's compact and low-profile so they feel light and stable on your back and won't create a ton of wind resistance,The hydration pack is your perfect choice for cycling, camping, running,music festival, rave , kayaking. A decent Holiday Gift for families and friends who love outdoor sports. Welcome to custom your Logo.