Combining the best properties of Cordura and 'Vinyl' packs, Imlay ‘Hybrid’ backpacks are sophisticated, comfortable and feature-rich, plus are canyon-durable and drain well. The Spry is a nice size (32L) for quick day jaunts. Tough PVC-laminate armor on the outside - the bottom and the sides - makes it canyon-resistant; an expanding back pocket has enough space for a helmet; the side-winder handle works great in the narrow stuff; and we put in a plastic framesheet plus 1/2" of foam so it has enough support for carrying loads without twitching out the back. The Insta-Drain design lets water drain from the pack quickly when exiting a pothole.