The versatile 3400 Junction allows you to keep your options open when it comes to packing for a big weekend, multi-day section hikes, thru hikes, or to meet the gear demands of changing seasons and environments. Ideal when resupply points are less frequent and/or for equipment flexibility is needed. When the extra volume is not in use, the 3400&';s top can roll down enough to make the overall size of the pack similar to the 2400, but that additional space can come in pretty handy when you need it. For hikes measured more by changes in climate zones and geographical features than distance, the Junction offers the ultimate versatility required to meet those demands. SPECS & DIMENSIONS MATERIALS : White: DCH50 (Main Body) & DCH150 (Bottom)Black: DCH150 (Main Body & Bottom) INTERNAL VOLUME : 55L | 3400 cu in. EXTERNAL VOLUME : 9.8L | 600 cu in. WEIGHT : White: 2.0 lbs | 32.0 oz. | 907.2 gBlack: 2.2 lbs | 35.2 oz. | 997.9 g*Average weight based on size medium LOAD CAPACITY : Up to 40 lbs BACK WIDTH : 10.5" | 26.7 cm HEIGHT (FULLY UNROLLED) : 34.0" | 86.4 cm TOP CIRCUMFERENCE : 40.0" | 101.6 cm BOTTOM CIRCUMFERENCE : 33.5" | 85.1 cm MADE IN : Mexico FEATURES External Pockets: One external center mesh pocket with two solid-panel Hardline with DyneemaA(R) pockets on the sides - dry gear faster with the middle pocket, protect or hide items in the sides Zippered Pockets: Hardline with DyneemaA(R) zippered pockets on hip belt with #5 YKK zipper Internal Sleeve: Internal 8" x 14" mesh sleeve for hydration bladder Top Closure: Roll-Top closure system Hip Belt: Hardline with DyneemaA(R) dual-density hip belt with 1/8" closed cell rigid foam, 1/4" closed cell foam and spacer mesh Back: Integrated 1/4" foam back panel pad Loops: Ice Axe Loop & Grab Loop Side Straps: Side compression straps for horizontal compression Top Compression Straps: Top Y-strap compression -- Designed to secure gear Shoulder Straps: Hardline with DyneemaA(R) shoulder straps with 3/8" closed cell foam and spacer mesh Sternum Straps: Adjustable sternum strap with self-tensioning elastic Buckles/Bungees: Four exterior triglide buckles for optional pack accessory straps Stays: Two removable, contoured aluminum stays Sealing: Seam tape on all vertical side seams and behind all sewn-on pack features Pack Accessory Options: Shoulder Pocket, Versa, REpack, Stuff Sacks & Pods Daisy Chains: Daisy chains on shoulder straps Water Resistant: Yes Compatible With: Pods, Drawstring or Roll-Top Stuff Sacks, Stuff Sack Pillow