Isosceles Storage System™ Carries Boots, Helmet and Gear Zippered Mesh Side Pockets and Top Lid Pocket Air/water Drainage Grommets. Made of Super Tough, Water-Resistant 600 Denier PVC Coated Polyester Volume: 2400 cu. in. / 40 L. The 07/08 Transpack XTW Boot Backpack for Women has the same features as the popular XT1 model, but is a bit smaller and is available in a floral design. This boot bag backpack has a pocket inside the lid. For added convenience, there are two mesh zippered pockets on either side for smaller items, like gloves. The Transpack XTW is made of super tough, water resistant 600 denier PVC coated polyester fabric. A rubberized bottom coating makes this boot backpack extremely durable in all weather conditions. A closed cell foam padded back and adjustable neoprene padded shoulder straps with sternum strap make this bag comfortable to wear, even when loaded up. Key features include an internal zippered pocket for personal items, an air and water drainage grommets, and a PVC-line