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). Designed with a comfortable carry system and full-featured storage, the Gregory Miko 30L Daypack always has our back for quick adventures into the woods and mountains. The BioSync hipbelt and shoulder harness, which stretch and move with us while cushioning the load, keep everything stable as we navigate tricky terrain. The external gear loops and trekking pole attachment free up our hands as we scramble up rocks, while the series of mesh and stretch pockets, an independent pocket for our hydration bladder, and large hipbelt pockets provide easy access to maps, tools, and headlamps.