BioSync flexible hipbelt and shoulder harness that stretch and move with the natural motions of your body. Adjustable torso length that is connected edge to edge to balance the load and provide 3.5" / 9 cm of adjustment. Channeled foam backpanel featuring aerodynamic grooves to promote air movement and keep your back cooler. Perforated, padded shoulder harnesses with flexible edge construction for dynamic, breathable comfort. Large zippered hipbelt pockets large enough to carry your phone and trail essentials. Independent zippered pocket with SpeedClip hydration hanger, compatible with Gregory's Hydro Reservoirs (reservoir not included). Packed with comfort and a plethora of pockets, the Gregory Miko 25L Daypack has our day hikes covered. Comfort stands out with Gregory's BioSync hipbelt and shoulder harness, which stretch and move with our body for more mobility and fewer rubs and hot spots. The pack also features a padded shoulder harness with a channeled foam backpanel with aerodynamic grooves for better airflw and comfort. We also like the pocket selection with a series of mesh and stretch pockets, an independent pocket for our hydration bladder, and large hipbelt pockets that provide easy access to our lip balm, snacks, and phones.