The largest of the Sirrus packs, the Osprey Sirrus 44L backpack features a highly ventilated back panel and a full set of hiker-friendly features. The Airspeed mesh suspension system maximizes ventilation and includes a ladder adjustment system to adjust the torso length up to four inches. The 44-liter capacity is best for short trips, but it's still long on features with an included rain cover, trekking pole and ice axe attachments, accessory straps for a sleeping pad, and plenty of pockets, including hip-belt pockets to get at small essentials without breaking stride. The Sirrus is a serious pack for a hut-to-hut trek, a supported backpacking trip, or a fast-and-light overnighter.
Responsible Collection: [nylon] bluesign®️ APPROVED, Recycled/Repurposed;
Material: [face fabric] 210D recycled nylon, PFC/PFAS-free DWR finish, [accent, bottom] 420D recycled nylon, PFC/PFAS-free DWR finish;
Volume: 44L (2685cu in);
Support/Suspension: adjustable AirSpeed suspension system, 4mm powder-coated LightWire frame, AirSpeed suspension backpanel;
Shoulder Straps: die-cut EVA foam, spacer mesh, adjustable sternum strap (whistle buckle);
Waist Belt: die-cut EVA foam, spacer mesh, ErgoPull closure;
Hydration Compatible: internal bladder sleeve (with backpanel hose port);
Reservoir Included: no;
Access: top drawcord, hidden vertical side zip ;
Pockets: [external] 1 zippered front stash, 1 zippered side, 2 side stretch mesh water bottle, 2 zippered lid (one with key clip), 2 zippered hipbelt, [internal] underlid zippered mesh with key clip;
Gear Loops: front panel lash loops, bottom accessory straps;
Ice Axe Carry: 1 ice axe loop (with bungee tie-off);
Trekking Pole Carry: Stow-on-the-Go attachment;
Sleeping Bag Compartment: zippered bottom access with floating divider;
Rain Cover: included, PFC/PFAS-free DWR;
Compression: dual-side;
Weight Capacity: 30lb;
Dimensions: 27.2 x 14.6 x 11.4in ;
Claimed Weight: 3lb 8.3oz;
Activity: backpacking;
Manufacturer Warranty: lifetime;
storecredits: 0.0;
