The Aero 28 is a frameless, running-vest-style pack built for multi-day fastpacking and big single-push days. A close-fitting vest harness puts two bottle pockets, two snack pockets and two phone-sized zippered pockets right on your chest, while the Dyneema roll-top body carries 28 liters inside with another 8.5 liters of external stash space in the front stretch pocket, angled side pockets and bottom mesh pocket. The hip belt comes off when you want to run light, and three adjustable sternum straps let you dial the fit.

• Volume: 28 L interior + 8.5 L external (36.5 L total)
• Weight: 17.2 oz (S) / 17.8 oz (M) / 18.1 oz (L)
• Dyneema Composite Hybrid 3.8 body, 100D Dyneema ripstop, Dyneema Stretch Mesh UL — PFAS-free
• Frameless with thin foam back panel; removable hip belt
• Vest harness: 2 bottle pockets, 2 snack pockets, 2 zippered phone pockets
• Roll-top closure, side compression straps, hydration port and hang loop
• Trekking pole and ice axe loops, grab loop
• Torso fit: Small 15–17", Medium 17–19", Large 19–21"