Size: 10" x 10.50" x 6" Weight: 18.40 oz Material: Nylon Warranty: Warranty against manufacturer's defects Linear Inches: 26.50" Our new lumbar pack has an ergonomic design that redistributes the weight of your pack throughout the lumbar area to reduce stress and strain on the shoulders, neck and back. The Vortex bag is a great choice for cycling or hiking enthusiasts.