Exped Lightning 50 Backpack Light on weight for long miles. Built for backpackers and thru-hikers who refuse to compromise on comfort, the Exped Lightning 50 strips away the excess and keeps what matters. The 50L capacity hits the sweet spot for extended weekend trips of 2-4 nights, or warm-weather thru-hiking adventures where every ounce counts. Exped's proprietary T-Rex frame suspension system - featuring a height-adjustable aluminum stay and stiff cross top piece - delivers exceptional load transfer and control without locking you into a rigid carry. A roll-top main opening, full compression system, stretch pockets, and modular attachment points round out a pack that's ready to go as far as you are. Made with bluesign(R)-approved, PFAS-free fabrics. Features Height-adjustable T-Rex frame suspension system with aluminum stay and stiff cross top piece provides excellent load control while naturally flowing with your movement for an all-day comfortable carry Minimal back contact point design keeps ventilation high and hot spots low, so you stay cooler on long days on the trail Roll-top main closure provides a wide-mouth opening for easy packing, while a top zipper offers quick access to essentials when the roll-top is cinched down Front and side compression system shrinks pack volume for lighter loads or loosens to accommodate extra gear when you need every liter Numerous external pockets and attachment points including two stretch water bottle pockets, a large stretch front pocket, zippered top lid pocket, and padded zippered hip belt pockets Trekking pole attachment and modular side attachment points for securing a sleeping mat, tent fly, or other bulky gearbluesign(R)-approved, PFAS-free fabrics with recycled materials incorporated throughout - because performance and responsibility shouldn't be mutually exclusive SPECIFICATIONSVolume50 LDimensions27. 6 x 13. 8 x 9. 8 in Min. Weight S/M: 2 lbs 8. 5 oz / L/XL: 2 lbs 10. 5 oz Max. Weight S/M: 2 lbs 9. 5 oz / L/XL: 2 lbs 11 oz Load Limit48. 5 lbs Torso Size S/M: Short/Medium / L/XL: Medium/Long Torso Length S/M: 17-20 in / L/XL: 19-22 in Frame T-Rex system - 6061-T6 aluminum stay with stiff cross top piece Shell Fabric210D HD ripstop nylon (PU coated, bluesign(R) approved) / Recycled 600D 82T polyester (PU coated, bluesign(R) approved)Closure Roll-top with top zipper quick-access Intended Use Backpacking, Thru-Hiking | Exped | Lightning 50 Backpack | Nylon