Swift 16 / Inertia 18 H2O

These sibling daypacks—the women’s Swift 16 and men’s Inertia 18—strip out heavy perimeter wire stays in favor of a hydration-first carry for fast half-day outings. Sized strictly for the essentials, they accommodate a light windshell, trail food, basic emergency gear, and water. By eliminating rigid frame architecture, both packs ride close to the spine, delivering an agile, bounce-free profile well suited to brisk trail paces and steep summer switchbacks.

The build pairs lightweight ripstop nylon with a perforated foam backpanel covered in moisture-wicking mesh. Central to the setup is Gregory's proprietary 3D Hydro reservoir, which hangs in an isolated sleeve to keep liquid weight centered against the upper back. The bladder's molded design dries noticeably faster than standard flat bladders, and a magnetic sternum buckle keeps the bite valve instantly accessible on the move. Exterior storage includes stretchy side bottle pockets and a zippered top compartment for smaller personal items.

On the trail, the lack of a structured, padded hipbelt means load support is entirely shoulder-dependent. The included webbing strap keeps the bag from shifting during rock hops, but it offers zero vertical lift if you overload the interior past twelve or fifteen pounds. Compared to rigid daypacks like Osprey's Talon series, this design trades heavy-load comfort for lower base weight and better mobility, making it an ideal companion for three-to-five-hour ridge runs and hot afternoon hikes.