Our Outdoor Convertible Backpack 45L is thoughtfully designed with dual interior and exterior compression system that allow you to pack more, while keeping valuables at reach. This backpack and hold a carry-on suitcase worth of essentials for up to a five-day excursion. Body is made from a lightweight, abrasion-resistant 100% recycled polyester, while zipper and webbing is amde from 100% recycled material.