This pack is designed for on-trail, off-trail, and all-season environments, with one mesh and two solid exterior pockets for the best of both Southwest and Windrider features. FeaturesOne of Hyperlite's three all-purpose backpacking models, this workhorse is designed for almost any backcountry activity, from on-trail hiking to the most demanding off-trail and all-season environments. Primary features include: Identical to Southwest/Windrider but with a mesh center exterior pocket and two solid-fabric side exterior pockets Two over the pocket compression straps for load security D-shaped flat bottom keeps pack upright while loading/unloading Roll-top closure with internal mesh sleeve & hydroport White pack is 50-denier DCH fabric, Black pack is 150-denier Sizes Small: 15"-17"Medium: 17"-19"Large: 19"-21"Tall: 21"+ Buckles & BungeesFour exterior triglide buckles for optional pack accessory straps CompatibilityPods, Drawstring or Roll-Top Stuff Sacks, Stuff Sack Pillow Daisy ChainsDaisy chains on shoulder straps External PocketsOne external center mesh pocket with two solid-panel Hardline with Dyneema® pockets on the sides – dry gear faster with the middle pocket, protect or hide items in the sides Zippered PocketsHardline with Dyneema® zippered pockets on hip belt with #5 YKK zipper Top ClosureRoll-Top closure system with side compression straps for vertical compression Hip BeltHardline with Dyneema® dual-density hip belt with 1/8” closed cell rigid foam, 1/4” closed cell foam and spacer mesh BackIntegrated 1/4” foam back panel pad Internal SleeveInternal 8" x 14” mesh sleeve for hydration bladder LoopsGrab Loop & Ice Axe Loop Pack Accessory OptionsShoulder Pocket, Versa, Stuff Sacks & Pods Side StrapsSide compression straps for horizontal compression Top Compression StrapsTop Y-strap compression -- Designed to secure gear Shoulder StrapsHardline with Dyneema® shoulder straps with 3/8” closed cell foam and spacer mesh StaysTwo removable, contoured aluminum stays Sternum StrapsAdjustable sternum strap with self-tensioning elastic and whistle SealingSeam tape on all vertical side seams and behind all sewn-on pack features Stress Point ReinforcementBar tacked reinforcements Water ResistantYes Volume55L External Volume9.8L Load CapacityUp to 40 lbs WhiteDCH50 (Main Body) & DCH150 (Bottom) BlackDCH150 (Main Body & Bottom) White Weight31.6oz | 896g Black Weight34.4oz | 975g Back Width10.5" | 26.7 cm Height - Fully Unrolled34.0" | 86.4 cm Top Circumference40.0" | 101.6 cm Bottom Circumference33.5" | 85.1 cm CountryMexico