The Aero 28 is built for the multi-day adventurer who prioritises movement, comfort, and accessibility to gear, hydration, and calories during faster-paced, higher-mileage endeavours. Designed to provide a perfect fit with its vest-strap harness system. Bring Efficiency To Remote WorkVest strap style harness with five Dyneema stretch mesh pockets and three sternum straps for a close to body fit and on the go access to pocket contents. Keep Everything Nice 'N TidyRemovable side compression straps allow for customisable pack loading and compression. BYOBFront bottle pockets fit most soft flasks. The Aero 28 features an ergonomic vest-strap harness system that sits close and comfortably to the body with integrated shoulder and storage pockets that allow multi-day fastpackers to keep everything they need outside of the pack and set up to carry onward. Optimised-for-access vest strap harness system keeps hydration and calories within reach Secure fixed yoke attachment of vest straps to pack Roll-top pack closure with single over-the-top compression strap and large outer stretch pocket Water bladder hang loop and hydroport Bottom stretch mesh snack pocket with trash port Dyneema Grid Stop side pockets angled for easy access and better retention of contents Fit: Take into account your typical pack size and shirt size, as well as your body type and chest measurements. With the running vest design and the likelihood of some stretch, opting for a smaller size may provide a better fit for those with a slimmer build. External PocketsVest: two water bottle pockets, two snack pockets, zippered phone pocket. Pack Body: bottom pocket, two side pockets, centre stretch mesh pocket Zippered PocketsZippered phone pocket on vest straps Top ClosureRoll top with single over the top strap Hip BeltRemovable 1"(2.54cm) webbing hip belt Back1/8"(0.3175cm) Foam back panel LoopsIce 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 StrapsFour removable side compression straps, two vertical compression straps Top Compression StrapsSingle over the top strap with side release buckle Shoulder StrapsVest strap style harness with spacer mesh, 100D dyneema ripstop and lightweight dyneema stretch mesh Sternum StrapsThree removable and adjustable sternum straps, one elastic and two webbing straps HydroportLow profile hydroport with bladder hang loop SealingTaped back panel MaterialDCH50, DCH150, 100D Dyneema® Ripstop, Dyneema® Stretch Mesh UL Internal Volume28L (M) External Volume8.5L Weight17.8oz (506g) Load Capacity25 lbs (11kg) Back Width10.75" (27.3 cm) Height30.25" (76.8 cm) Top Circumference34.75" (88.3 cm) Bottom Circumference29.5" (74.9 cm) CountryMexico To maximise the performance of your Hyperlite Mountain Gear products and ensure that they live a long, reliable, and productive life, we recommend that you familiarise yourself with their Care Instructions.