Thank you for viewing. I purchased this a few years ago and mainly used it in the snowy mountains. - Brand: OSPREY - Product Name: Switch 40+5 - Color: Blue - Features: This backpack is suitable for day trips in the snowy mountains. The sides are rigid and sturdy, allowing skis to be attached securely. There is a large pocket on the back for storing wet items such as crampons separately (with drainage holes). The hydration system can be removed and used independently. - Condition: There are stains and small scratches as shown in the photos, but there are no signs of hydrolysis. It has been hand-washed before listing. - Size: S