The NEW High Sierra 2L Hydration Pack is a versatile and durable backpack designed for outdoor activities like biking, running, and hiking. With a sleek black color and reflective accents, this pack provides both style and safety during low-light conditions. The High Sierra brand ensures quality and reliability, making this hydration pack a great choice for adventurers looking to stay hydrated while on the go with zero BPA and a low profile bite valve. The exterior pocket is the ideal size for your bike helmet or other gear as shown in photos on the tag.