For carrying gear in truly wet and stormy weather, a roll-top closure is an easily accessible and secure solution. Torrent 20 is the smallest of the Torrent series, and its compact size makes it just right for day hikes in any conditions. Torrent is built with extremely durable 840-denier Oxford nylon, meaning it will take a great deal of abuse and is often used for rugged activities such as canyoning, where packs are sometimes lowered or hauled across abrasive rock surfaces. Its welded seams and TPU film laminated fabric ensure a completely waterproof main compartment and the roll-top closure (secured with quick-closing small carabiners) makes for a pack that will withstand a soaking. For urban uses, Torrent 20 features a neoprene notebook/tablet sleeve and a small mesh pocket to secure keys and wallets. A bike light attachment loop and reflective logo help with visibility while biking. Note Roll-top closures, while considered waterproof against precipitation when rolled at least 3 times, are not waterproof when submerged. The pressure of submersion is too great for any roll-top pack or stuff sack and water will find its way inside.