Used only once, in excellent condition. Two HydraPak 500ml soft flasks were included at the time of purchase, but are not included. M size (H40xW20xD10.5cm, 11L) Phantom #MM62361-PT Amp Ultra 10 MACPAC A lightweight pack for a wide range of scenes, from trail running to day hiking. The Amp Ultra 10 is designed to handle everything from day hikes carrying only the essentials to multi-sport adventure races. Weighing only 410 grams and with a capacity of 10 liters (S size), it pursues efficient storage of carefully selected equipment. The material is 100-denier ripstop nylon with sufficient strength. It has a simple single-compartment structure and uses panel loading that can be accessed with a zipper. The shoulder harness has a three-dimensional structure to enhance the fit. The stretch pockets arranged from the front to the sides are designed to be accessible while wearing the pack.