Be ready for your next adventure with the UltrAspire Astral 3.0 Hydration Pack. This award-winning backpack is designed for the chest, heart and lungs to be free and unrestricted to the open air. New improved fit and increased capacity conforms to a myriad of beautiful shapes and sizes. The pack can hold a water bottle in the front pocket, comes with a 2L reservoir in the back, and holds all essentials in the zippered pockets. Perfect for every activity from daily road training to ultra racing. Though this pack is gender-neutral, it’s specifically designed to fit women. One size fits most.