IMPROVE YOUR TIME ON THE TRAILS WITH THE OUTDOOR RESEARCH ISOLATION HD BACKPACK. The Outdoor Research Isolation HD Backpack is the perfect bag for a day out on the trails. It has plenty of room to carry all your essential items like bug spray or rain jackets, plus all the water you can drink. And with a webbing hipbelt and adjustable sternum strap, this bag will stick to you like glue. FEATURESLightweight day packLid pocket doubles as a stuff sackDurable bound seamsDrawcord cinch closureBuckled lidInterior zippered organizer pocket, external mesh water bottle pocketsHydration bladder compatibleAdjustable sternum strap and hip beltTECH SPECS19 L volume100% nylon material with a TPU coating on body and PU coating on bottom and back panel19 x 10 x 6.5in