i have an ancient Lowe Alpine Contour 75 litre. Excellent, fully adjustable back, great shoulder and hip straps. Designed for climbing gear (heavy, steel stuff, and ropes etc.) so is bullet proof and can carry much more weight than I will ever hike with. Consequently, a bit on the heavy side. It just won;t wear out. I've no doubt the newwer stuff is just as good and just as comfortable.