The Tempest Pro offers upgraded durability and technical advantages with Osprey's NanoFly(R) fabric and subtle design enhancements-perfect for adventurous full-day pursuits requiring advanced gear or light-and-fast missions. One of the most versatile technical pack series ever created, the Tempest Pro is designed to optimize stability during committing adventures-peak bagging, bikepacking, alpine climbing-while maintaining ventilation and comfort. The BioStretch harness, continuous-wrap hipbelt and an injection-molded, ridged-foam AirScape(R) backpanel offer a lightweight, ventilated and close-to-body fit that's ideal for dynamic body movement during demanding activities and over the most technical terrain.