The Terra pack has a long, J-shaped zipper on its front panel, allowing for a third access point in addition to the top and lower ones. The backpack is made in two frame sizes: The back length of the S/M size adjusts between 38 - 50 cm, and its hip belt adjusts between 71 - 86 cm. The back length of the L/XL size adjusts between 43 - 55 cm, and its hip belt adjusts between 86 - 106 cm. The back length is measured from the hip at the level of the iliac crest to the most prominent vertebra (see additional image). - Main material: 210 denier polyamide fabric - Reinforcement panels: 600 denier polyester fabric - Aluminium frame system brings the weight on your hips - Dyno-Lift straps keep the upper part of the pack in check - Optifit carrying system for comfort - Dedicated sleeve for hydration bag - Chest strap with safety whistle on its buckle - Floating flap enables a snug fit, or packing a tent or sleeping bag in between - Back panel with foam padding and breathable mesh fabric -