The Freerain28 is a 28 liter high-performance waterproof backpack that compresses for travel. Features 28 liter capacity Waterproof main compartment with internally sealed seams Rolltop closure features an integrated zipper closure option for fast access or added security Compresses for travel, included mesh compression sack UHMWPE-reinforced wear panels for extreme durability, abrasion resistance, and tear strength Hydration compatible Hip belt with pockets (fixed) Adjustable sternum strap Two gear loops with corresponding Hypalon™–reinforced shockcord captures Breathable, weight distributing shoulder straps Water resistant front zipper pocket with sealing zipper Oversized mesh side pockets Compression straps with side release buckles for stabilizing loads or attaching exterior equipment Load lifters for adjusting weight distribution and fit 100% waterproof main compartment: Rolltop closure and seam sealed main compartment. Full alpine carry harness: Contoured monomesh shoulder straps distribute weight evenly while the sternum strap, pocketed hip belt, and load lifters yield an agile, customized fit. Compresses for travel: Stow into the included mesh compression sack, take it with you. Specifications Volume: 28 liters Weight: 12.3oz (350g) Unpacked Dimensions: 21.5 x 11 x 8in (54.6 x 27.9 x 20.3cm) Packed Dimensions: 4 x 4 x 5.5in (10 x 10 x 14cm) Materials 70D Robic® nylon UHMWPE (Ultra-high-molecular-wight polyethylene) reinforced ripstop, PU waterproofing 50D nylon mini ripstop, UTS waterproofing Internally sealed seams Nylon monomesh shoulder straps Hypalon™ rolltop and tether point reinforcements Number 5 YKK® PU coated sealing zippers YKK® ultralight, wide entry angle side release buckles 210D bonded nylon thread Not intended for submersion.