Features Enter your model number to make sure this fits. Material: [body] 420D nylon ripstop, [base] 600D nylon Volume: 2746 + 427 cu in Support/Suspension: Butterfly, EVA back panel Shoulder Straps: EVA foam Waist Belt: yes Description Product Description Mammut's Trion Guide 45 + 7 Backpack caters to the four-season climber who isn't easily dissuaded from alpine activities once winter blows in. When the summer months lead you to high elevation granite routes, the Trio Guide will carry everything you need for the ascent with a rope fixing strap under the lid, daisy chain gear haulers, and gear loops at the removable hip belt. The hip belt allows you comfortably wear a harness with the pack still on. Once winter makes you switch out your approach shoes for a pair of ski boots, the Trion Guide will remain on your gear list with a grip of ski-friendly features like the side ski carry straps, two secure ice axe loops, and a large main compartment with both top and side access points for when you need to access avy gear quickly.