Apple Green Millet Saas Fee, an older model. This is a 30L + 5 backpack, which I used for trekking and day hikes. The size is men's L, and according to the manufacturer's website, the back length is 51cm. When listing, I washed it in a bathtub with a neutral detergent and hung it to dry in the shade, but I haven't used waterproof spray yet. There are some stains and wear and tear due to aging, but I think the straps and zippers are strong enough for use. I recommend this to those who want to start mountain climbing but are unsure if they will continue, and want to try a used item first. It's a size that can handle equipment for about one night at a mountain hut. The rain cover is stored at the bottom of the backpack. - Model name: SLAAS FLEE 30 - Color: Apple Green - Capacity: 30L Material: Water repellent Size: 30-45L Popular model: Saas Fee