Black Diamond Nitro Pack A breathable, mid-volume day tripper with the ideal hiking feature set and our reACTIV suspension ReACTIV suspension with high-flow Open-air back panel, shoulder straps and waist belt and Zippered panel access Trekking pole/ice axe loops, bike light clip Front, side and hip belt stretch pockets and rain cover pocket (rain cover not included) Hydration compatible with external access hydration sleeve