Mountainsmith Lumbar-Classic Series Nitro TLS R Backpack Made from 450d ReForge PET RipStop body fabric (100% Recycled) Lumbar pack ideal for short trail runs and day hikes Zippered main compartment and internal hanging zippered compartment Front zippered pocket; 185 cubic inches of storage space Made of 100-percent recycled ReDura PET body fabric Measures 12 x 6.25 x 5.5 inches (W x H x D); weighs 4 ounces