Stay comfortable and move freely on the trail with the Aero 28. Designed with a close-to-body vest-style harness, it gives you easy access to food, water, and gear—so you can keep going without stopping. Whether you're pushing for a fastest known time or just racing the sunset, this pack has your back. DESIGNED FOR: UL Fastpacking / Thru Hiking / Backpacking KEY FEATURES: Vest-style shoulder straps keep hydration and calories within reach, offering easy access during active pursuits. The bottom pocket, front stretch mesh pocket, and two oversized side pockets provide quick and easy access to gear. The roll-top pack closure with a single top compression strap ensures secure packing and easy volume adjustments. External Pockets Vest: two water bottle pockets, two snack pockets, zippered phone pocket. Pack Body: bottom pocket, two side pockets, center stretch mesh pocket Zippered Pockets Zippered phone pocket on vest straps Top Closure Roll top with single over the top strap Hip Belt Removable 1" webbing hip belt Back 1/8" Foam back panel Loops Ice Axe Loop, Loops on center panel for side compression straps or adding shockcord, loops on side panel for side compression straps, elastic loop on vest harness for trekking pole storage Side Straps Four removable side compression straps, two vertical compression straps Top Compression Straps Single over the top strap with side release buckle Shoulder Straps Vest strap style harness with spacer mesh, 100D dyneema ripstop and lightweight dyneema stretch mesh Sternum Straps Three removable and adjustable sternum straps, one elastic and two webbing straps Hydroport Low profile hydroport with bladder hang loop Sealing Taped back panel Material Dyneema® Composite Hybrid 3.8, Dyneema® Composite Hybrid, 100D Dyneema® Ripstop, Dyneema® Stretch Mesh UL Internal Volume 28L (M) External Volume 8.5L Weight 17.8oz | 506g Load Capacity 25 lbs Back Width 10.75" | 27.3 cm Height 30.25" | 76.8 cm Top Circumference 34.75" | 88.3 cm Bottom Circumference 29.5" | 74.9 cm