Climb your next mountain or descend deep into the desert with the lightweight Mystic 20L Hydration Pack. This durable, water-resistant pack features a 3L hydration bladder that rests securely in a dedicated rear pocket with a zipper closure. The Mystic 20L Hydration Pack is intelligently designed with a triangle foam back panel for added comfort and breathability. Perfect for mountain biking, hikes, trail running, and those looking for extra storage in a hydration pack.