Hardwearing and highly functional the osprey kestrel 48l rucksack is a truly dependable all season trail pack ideal for longer hikes and overnight excursions crafted from resilient fabrics this pack will withstand even the harshest of conditions osprey have fitted the kestrel with their airscape back panel which enhances fit and dramatically increases ventilation hydration system compatible with an adjustable torso harness as well as the stow on the go trekking pole attachment system and m