Gregory Katmai 55 Pack 135276-136952-7411 Small/Medium Specs: Adjustable Torso Yes Fits Torso 15" - 19" / 38.1 - 48.3 cm Adjustable Hipbelt Yes Fits Hips / Waist 25" - 48" / 63.5 - 121.9 cm Weight 4.61 lbs / 2.09 kg Volume 50 L / 3051 cu in. Max Carry Weight 45 lbs / 20.4 kg Packed Dimensions 28.7" x 12.6" x 16.5" / 73 x 32 x 42 cmMedium/Large Specs: Adjustable Torso Yes Fits Torso 18" - 22" / 45.7 - 55.9 cm Adjustable Hipbelt Yes Fits Hips / Waist 27" - 53" / 68.5 - 134.2 cm Weight 4.68 lbs / 2.12 kg Volume 55 L / 3356 cu in. Max Carry Weight 45 lbs / 20.4 kg Packed Dimensions 30.3" x 12.6" x 16.5" / 77 x 32 x 42 cmMaterials: External Material 100% Nylon Frame Materials Alloy Steel Frame & Fiberglass Anti-Barreling Cross-Stay & HDPE Pack Body 210D High Density / 40% Recycled Nylon & 420D High Density / 45% Recycled Nylon with PFC-Free DWR Pack Bottom 420D High Density / 45% Recycled Nylon with PFC-Free DWR Lining 40% Post-consumer Recycled / 135D Polyester with PFC-Free DWR Suspension Lifespan EVA Foam & Polygiene® Stays Fresh Technology Features Zippered bottom sleeping bag compartment with removable divider Moisture wicking ventilated backpanel with Polygiene® Stays Fresh Technology - an odor control airmesh treatment that inhibits the growth of odor causing bacteria Sunglass QuickStow system on shoulder harness for quick, secure and scratch-free access to your shades Quick-pull drawcord closure and top webbing compression FreeFloat 360 ventilated backpanel with dynamic flex panels and auto rotating shoulder straps that move with the natural movements of your body Oversized front zippered compartment with mesh divider to keep items in order Front oversized stretch mesh pocket with secure buckle closure By using recycled fabrics, this pack's carbon footprint is reduced by 28% compared to a conventional nylon pack. The equivalent to 89 miles (143 km) driven; you can help offset that amount by walking, biking, or car sharing instead of driving solo Full length side-loading access zipper for easy unloading and gear organization Side stretch mesh pocket with pass through for over-or-under compression NANO CONNECT - Included interior toggles to connect Nano 14 Daypack Perimeter alloy frame and fiberglass anti-barreling cross-stay for stable load management SideWinder bottle holster for one-handed on-the-go water bottle access - tucks away when not in use Custom ComfortGrip molded zipper pulls and molded webbing keepers for strap management Auto-rotating, dual density shoulder harness with sternum strap featuring integrated safety whistle and hydration clip Floating top pocket with large zippered compartment, small quick access pocket and an underside zippered pocket, reflective attachment points and key clip Adjustable attachment loops and upper shock locks for trekking poles or ice axe Adjustable shoulder harnesses and torso length plus customizable hipbelt fit and 3D Comfort Cradle for hotspot free, body-hugging comfort Internal hydration sleeve with SpeedClip hydration hanger compatible with Gregory's 3D Hydro Trek Reservoir (reservoir not included) Gregory Katmai 55 Pack