I've been using this for about six months. About this product: Capacity: 53-70L Size: W525-685 x H300 x D320 (mm) Features designed for ease of use and a simple design. Perfect for camping and touring. Also recommended for commuting to work or school. Quickly increase capacity with the zipper. You can rest assured even if your luggage suddenly increases. Large opening design makes it easy to take things in and out. You can rest assured even in sudden rain with the rain cover. It's also easy to take out and tighten.