The Gregory Nano 18 H2O Hydration Pack - Plus Size features extended-length shoulder straps and hip belts for larger body sizes, with torso sizing consistent with other Gregory packs. It includes a quick-drying 3-liter Hydro reservoir in a separate zippered compartment. The grooved foam back panel enhances airflow, padded shoulder straps include a magnetic sternum buckle and hydration routing. Additional features include multiple zippered pockets, reflective loops, removable hip belt, padded haul handle, and a durable water repellent finish without PFAS. It is made with recycled materials, reducing its carbon footprint by 40%.