This is a hip bag jointly developed by ENVE, a famous brand for carbon fiber bicycle parts, and Mission Workshop. Please comment if you have any questions. From the website below: Mission Workshop Axis Pack High-strength 500D nylon, poly-coated nylon liner Laser-cut back panel Coated YKK zippers Floating internal lining for increased weather resistance Zippered organizational pocket inside Dimensions: 2.5 L (10x5x4”) Body bag, waist pouch I will ship it as compactly as possible.