The GREGORY Gravity 50L Backpack is a high-quality, durable backpack designed for mountaineering and backpacking. Made in the USA, this backpack features a waterproof nylon material, a zip closure, and a large capacity of 50L. It also includes a hip belt, adjustable padded straps, a ventilated back panel, and external pockets for extra storage. The backpack is lightweight and resistant to water, making it a practical and reliable choice for outdoor adventures.