Deuter ACT Trail 28 SL Hiking Backpack BY WOMEN, FOR WOMEN - SL packs bring together the latest physiological science and advanced ergonomics to deliver optimal comfort and performance through anatomically-sound construction MAX VENTILATION - AirContact back system delivers a body-hugging fit paired with unmatched breathability; The large open pore structure of the AirContact pads performs a pump effect that moves warmth and moisture away from the body; The result: 15% less perspiration than other body-contour packs LIGHTEN UP - A flexible, tensioned Delrin U-shaped frame provides stability without weighing you down; It follows your every movement with absolute ease to create a compact carry system with even load distribution and effective load transfer FEATURES - Built-in raincover; specialized compartments for your 2 or 3-liter hydration system, hiking poles, and wet gear or clothing; pockets in all the right places and a large U-shaped two way zip opening for easy access BUILT TO LAST - A 50-50 blend of Microrip-Nylon and Super-Polytex Polyester gives the ACT Trail packs lightweight, high-performance durability; Strong ripstop threads and PU coating makes these backpacks water- and abrasion- resistant