Features A spacious daypack for long adventurous days, the Sonar features a large panel access, our reACTIV suspension and added internal organization ReACTIV suspension with high-flow Open-air back panel, shoulder straps and waist belt and Zippered panel access Fleece-lined electronics pocket and zippered organizer pockets Trekking pole/ice axe loops, bike light clip and Front, side and hip belt stretch pockets and rain cover pocket (rain cover not included) Hydration compatible with external access hydration sleeve Description Product Description Product Description DECENT FEATURES of the Black Diamond Sonar Pack ReActiv suspension with high-flow OpenAir back panel, shoulder straps and waist belt Zippered panel access Fleece-lined electronics and zippered organizer pockets Trekking pole/ice axe loops, bike light clip Front, side and hipbelt stretch pockets, and rain cover pocket (not included) Hydration compatible with external-access hydration sleeve The SPECS Type: Unisex Material: 210d Nailhead main, 210d Dobby abrasion The SPECS for S/M Volume: 1,464 cubic inches / 24 liter Average Stock Weight: 2 lbs / 920 g The SPECS for M/L Volume: 1,587 cubic inches / 26 liter Average Stock Weight: 2 lbs 1 oz / 940 g From the Manufacturer Featuring our reACTIV suspension and a spacious interior capable of swallowing a full day's worth of gear, the 26-liter Black Diamond Sonar pack is ready for summit scrambles, loop hikes and any other on- or off-trail day of adventure. The Sonar's high-flow Open-air back panel, shoulder straps and waist belt keep your back cool and well ventilated during hot, sunny days. We designed the Sonar with a slew of organizer pockets, including a fleece-lined pocket for your phone or MP3 player and a rain cover pocket (rain cover not included) if the weather gets foul.