Description Super lightweight and hauls juuust enough for fast and light multi-day treks or ultralight overnights. Features are focused. The frameless design and lightest-in-category hardware and compression shed weight, while the recycled Robic nylon fabric is super tough and amazingly light. Features 36L capacity Detachable Fastbelt Removable SitLight Pad Customizable compression options Corded trekking pole system Headphone port Tough recycled Robic fabric Specifications Weight: Small: Pack body 13.3 oz / 377 g, Fast belt 3.3 oz / 94 g, Sitlight pad 2.3 oz / 65 g, Total 18.9 oz / 536 g Medium: Pack body 14.2 oz / 403 g, Fast belt 3.3 oz / 94 g, Sitlight pad 2.5 oz / 71 g, Total 20 oz / 567 g Dimensions: Small: Height 19.5” / 49.5 cm to extension collar seam, Width 11” / 28 cm, Depth 4.5” / 11.5 cm Medium: Height 21.1” / 53.5 cm to extension collar seam, Width 11” / 28 cm, Depth 4.7” / 12 cm Details: Capacity: 36L Total, 28L in main pack body to extension collar seam, 8L in mesh pocket and side pockets. Carry Capacity: Comfort Carry 20 lbs, Max Carry 25 lbs Materials: Top Custom 70D Robic Nylon, Boot Custom 100D Robic Nylon, PFAS Free Size Guide Small: Torso - 17" - 19" Medium: Torso - 19.5" - 21.5"+ If you're in between sizes, you will want to - Size down for more of a shoulder wrap and higher hipbelt - Size up for a lower hipbelt fit The volume capacity specs are specific to a medium size pack. Capacity will vary slightly between sizes