- AirScape™ mesh covered accordion foam backpanel for comfort and fit - External hydration access - Internal key attachment clip - LED light attachment point - Seamless lumbar to hipbelt body wrap - Single ice axe loop - Sternum strap with emergency whistle - Stow-on-the-Go™ trekking pole attachment - Stretch front pocket - Stretch mesh side pockets with InsideOut™ compression - Stretch pocket on harness - Top lid access - Twin zippered hip belt pockets Size: 55 x 24 x 22 cm S/M - 16 L - 0.59kg M/L - 18 L - 0.64kg