Osprey's stripped down, streamlined, and svelte Aether Pro 70 is made for type-two adventures that span days or months; alpine climbing expeditions with remote basecamps; or boundary-pushing thru-hikes through unknown landscapes, where the only trail is the one you make. With one zipper and strengthened hardware, this pack provides worry-free dependability. The hipbelt and harness are interchangeable, and the hipbelt can be custom molded to achieve a fit that's as perfect as this pack. . . Body: NanoFly(TM) 210D Nylon X 200D UHMWPE. Accents: 315D Nylon Cordura(R) USA. Bottom: 200D UHMWPE. High-Performing Design: Stripped down, lightweight, lean, and mean for moving fast and getting the job done. Built with rugged dependability to keep you moving strongly toward your objective, no matter how big.. Lightweight and Streamlined: These packs are built for those who appreciate efficiency and create their own specific systems of organization based on their unique needs, whether expedition mountaineer or explorer of points unknown. Custom Molding: They don't just carry heavy loads well; they also fit bodies of all shapes and sizes. Interchangeable harness sizes coupled with heat-moldable hipbelts provide the most outstanding fit and comfort possible.. A Yarn To Tell: NanoFly(TM) fabric integrates ultra-high-molecular-weight polyethylene (UHMWPE) ripstop and 210D Nylon, creating an incredibly light fabric with remarkable abrasion resistance.. Removable floating top lid with a zippered pocket for storing smaller items. Integrated FlapJacket(TM) protects packed gear when top lid is removed. Stow-on-the-Go(TM) trekking pole attachment allows you to stow your poles in steep terrain or whenever you need your hands free. Dual removable ice tool loops with upper cord attachments. Internal reservoir sleeve accommodates up to a 3L reservoir. Dual front compression straps maintain a slim profile and stabilize loads. Large, dual removable hipbelt pockets, one zippered and one with a cinch closure, keep a water bottle, snacks, and smaller items close at hand. Dual removable side compression straps stabilize loads or can be removed to save weight. Reinforced cord loops to attach Osprey Daylite daypack or Alpine Pocket. Removable sleeping pad straps. Sternum strap with whistle for moments when "safety third" doesn't cut it*. Lightwire(TM) Suspension: Aluminum 7075 peripheral frame effectively transfers load to hipbelt; Single 6061-T6 center stay maintains backpanel shape. Airscape(TM) Backpanel: Precision-cut and accordion-spread mesh-covered foam ridges. Lightweight and comfortable contact surface. Isoform4 Harness: Spacer mesh fabric provides a comfortable fit. Isoform4 CM(TM) Hipbelt: Custom heat molding for a precise, personalized fit. Volume:. . Small: 4089 cu. in. / 67 L. Medium: 4272 cu. in. / 70 L. Large: 4455 cu. in. / 73 L. . Dimensions:. . Small: 32.28H x 17.72W x 14.57D in.. Medium: 34.25H x 17.72W x 14.57D in.. Large: 36.22H x 17.72W x 14.57D in.. . Weight:. . Small: 3.81 lbs.. Medium: 3.94 lbs.. Large: 4.06 lbs.. . Holds 30-60 lbs.. Torso:. . Small: 16-19 in.. Medium: 18-21 in.. Large: 20-23 in.. . Spot clean. Imported.