Black Diamond Sonar Camping Backpack 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