This is a Mammut Nirvana Pro 25 backpack. It can be used for trekking and backcountry activities. ■ This was purchased in Zermatt, Switzerland, and I have some sentimental attachment to it, so I stored it without using it much. ■ Upon checking the condition, the following issues were found, so although it looks clean, I will list it as "has some scratches and dirt." ・ A part that has deteriorated and is missing (the binding part that was on the blue circle in the last photo) ・ Some stickiness on the back of the gray part on the outside (on the back of the part with the blue line in the last photo, which feels like deterioration rather than a specification) ・ There may be some other minor deterioration ■ Storage ① Main compartment (accessible from the outside on the back side) ・ Two zippered compartments (one with a key holder attachment, the other with a FIRST AID mark) ・ Storage bag that can be opened and closed with Velcro (detachable with Velcro) ② Top ・ Helmet holder storage pocket ③ Second compartment (red storage outside of ①) ・ Two pockets inside ④ Outside (gray storage further outside of ③) ・ Shallow storage space ⑤ One of the shoulder straps (Mammut logo side) ・ Zippered storage along the shoulder strap ■ Catalog information (reference) Weight (g): 1550 Dimensions (cm): 52x29x20 Product introduction ・ U-frame, 6 mm thick aluminum, adjustable ・ 2-layer, high-density EVA back padding, hip and shoulder belts with laminated stretch material cover ・ Front pocket for avalanche safety equipment ・ Ski attachments that can be used on the side or diagonally ・ Very durable and adjustable Velcro ski loops on the sides ・ Snowboard carrying with fully adjustable stability belt that does not hinder leg movement ・ Snow helmet carrying, storable ・ Two snow mountain tool/trekking pole attachments ・ Padded goggle pouch ・ Zippered internal compartment with key clip ・ Hip belt pocket ・ Removable padded hip belt ・ SOS label with emergency instructions ・ Insulated hydration tube cover on the shoulder harness ・ Hip belt with gear loops ・ Hydration system compatible