Mountaineering and skialp backpacks are designed for skis, board and a day on the wall. They are made of durable materials with a water-repellent finish and are easy to handle even with gloves. A common feature is a reinforcement in the back of the pack to cushion the impact during a fall on the back. With freeride and skialp backpacks, it is important that they sit well on the back and do not "fly" from side to side. A quality back system with a lumbar and chest belt will help to stabilize the backpack on the back.