Classic trekking packs constructed from durable 300D Mini Ripstop polyester, 450D polyester and 600D polyester on the bottom. 30, 40 and 50 liter models feature the innovative Dry Back Light system for outstanding ventilation during rigorous activity. 60, 70 and 80 liter models feature the new EASY Back system to accurately adjust large loads for any body type. Gamma packs feature two front pockets, two side pockets and four lid pockets (two external and two internal - one is detachable for valuables). 60, 70 and 80 liter models also feature a bottom compartment that can be segmented off from the main compartment with a drawstring and can be accessed through a front zipper. Rain cover included. Equipped with systems for carrying ice axes or trekking poles. Available in six capacities: 30, 40, 50, 60, 70 and 80 liters.