This world-famous ultralight pack weighs a little and hauls a lot, thanks to its internal frame. Recycled Robic nylon resists cuts and tears. Ample pockets make organization a breeze. The Mariposa is sized for big trips, bear canisters, and serious mileage. An S-curve harness and load lifters provide even weight distribution, and you&';ll enjoy Gossamer Gear&';s signature PVT Frame+Belt: an aluminum, closed-shape frame and pivoting hipbelt that allow your pack to move with your natural gait for maximum comfort. **The Small Mariposa comes with a S/M Curved Belt. The Medium and Large Mariposa comes with a Medium Straight Belt. Features 60L capacity S-curve harness and load lifters Comfy, removable PVT Frame+Belt Large external stretch-mesh pocket Trekking pole attachments Hydration tube router Headphone port Side ice axe loop Tough recycled Robic fabric Specs Average Weight Medium Mariposa Pack body 18.5 oz / 524 g Pack frame 4.3 oz / 122 g Sitlight pad 2.3 oz / 65 g Total with no belt 20.8 oz / 590 g Total with M Straight belt 34.2 oz / 968 g Capacity Total 60 L In Main Pack Body to Extension Collar Seam 36 L Spread Across 7 Exterior Pockets 24 L Max Carry Capacity 35 lbs For Comfort 30 lbs **The volume capacity specs are specific to a medium size pack. Capacity will vary slightly between sizes Sizes For best fit, you will need your torso length, hip and waist measurements. Torso length: 1. Start at the C7 vertebra at the base of your neck. The best way to find this is to bend your neck and feel the first bump along the base of your neck. This bump is where you will want to start your measurement. 2. Next, you&';ll want to find the midpoint between your iliac crest. To find your iliac crest, cup your hip bones on both sides and find the center point on your spine. This midpoint is where your thumbs should be pointing. 3. Finally, measure from the C7 vertebra to your iliac crest. From there, you&';ll have your torso measurement. Small: 16" - 18" Medium: 18" - 20" Large: 20" - 22" If you&';re in between sizes, you can: + size down for more of a shoulder wrap and higher hipbelt + size up for a lower hipbelt fit