Sierra Designs Flex Lumbar 3L-6L

"The Flex Lumbar 3L-6L from Sierra Designs is a versatile companion for adventures and everyday life. Whether for hiking, cycling or everyday use, this backpack always offers the perfect storage space thanks to its flexible design. The innovative, vertically expanding Flex-Zwickel system allows you to adjust the volume to the respective load so that you are always optimally prepared. The backpack has a main compartment and a valuables compartment, which offer sufficient space for your items."
"The stretch-mesh-pockets on the sides are ideal for water bottles, while the padded hip belt with stabilizing straps ensures maximum comfort and even weight distribution. Made from robust 100-denier-nylon/polyester, this backpack can withstand harsh conditions and offers a long service life. The double compression straps also stabilize the load and make the Flex Lumbar 3L-6L a reliable partner on all your trails."