Purchased at a Montbell shop and used for tent camping and other purposes. How about it for the summer mountain season? Here's the manufacturer's description: ——— Regular price: ¥26,400 (tax included) This is a lightweight backpack for women with a roll-up system that offers excellent operability and waterproofness. The main body fabric uses a unique material that combines ultra-lightweight properties with strength. It features an inner bag and Aqua Barrier Sack made of waterproof materials, providing high waterproof performance. While prioritizing lightness, it also offers a comfortable carrying experience and a variety of functions. Includes a top lid that can be removed and used separately. Specifications 【Material】Body: 30-denier Ballistic® nylon ripstop [urethane coating] (Bottom) 100-denier nylon ripstop [urethane coating] Back: 3D mesh Aqua Barrier Sack: 40-denier nylon ripstop [urethane coating] 【Weight】950g 【Color】Dark Gray (GRBL) 【Capacity】40L (Height 64 x Width 34 x Depth 25cm) 【Back Length】48cm 【Features】Hooked cord, wand pockets, hip belt pockets, shoulder pockets, chest support, side straps, pole loops, ice axe loops, Aqua Barrier Sack, top lid that can be used as a shoulder pouch, compatible with trail water packs