The Cotopaxi Allpa is available in 28, 35 or 42 liters, it offers a pocket to store your water bottle, and several internal compartments for your favorite accessory or clothing. No more need for suitcases with the Cotopaxi product. The Tarak 20L Cotopaxi was designed with climbers and skiers in mind (but it's also a real joy for hikers). No unnecessary straps or buckles on the Tarak, just a simple system to use (even with gloves). The zippered top cover gives you access to small essentials and serves as an extra attachment point for a climbing rope. A hydration pouch, low-profile shoulder straps and a removable waist belt make the Tarak perfect for your sports outings. In short, this is the kind of bag that goes everywhere with you, whether you're biking, trail riding, skiing, climbing or hiking.