For a lightly loaded day pack, determining the exact back length is not absolutely crucial. With trekking or mountaineering backpacks, however, it is essential, as only a perfect fit will efficiently transfer the weight to the hips. With heavy loads or backpacks featuring an internal carrying system, the centre of the hip wings should ideally rest on the iliac crest and the rear pad on the sacrum.
How do you measure back length?
To determine the back length, use a tape measure to measure the distance between the base of the shoulders or the level of the 7th cervical vertebra (which you can feel protruding where the neck meets the spine) and the upper edge of the iliac crest.
The Lightning, Ridgeline and Skyline rucksacks are fitted with a unisex carrying system. They offer two adjustable back lengths: S | M and L | XL.
Black / S/M
Ultralight, comfortable backpacking pack with roll-top closure
innovative, customisable T-Rex carrying system
efficient packing volume management
ultra-light ripstop nylon with reinforced base
Product Description
With its ultra-lightweight construction and adjustable back system, the Lightning was developed for trekking tours where low weight and high carrying comfort are crucial.
The innovative T-Rex carrying system with reduced contact points ensures effective ventilation and freedom of movement. The back length can be precisely adjusted, while the efficient load transfer to the hip belt ensures a stable and comfortable fit even with a heavier pack weight.
Sophisticated pack volume management allows flexible adjustments. The zig-zag compression straps are easy to adjust and, together with the roll-top fastener, allow variable volume control. They also secure larger equipment such as a sleeping mat or flysheet. Generous mesh outer pockets, zipped pockets on the hip belt and modular attachment points support clear organization.
Made from ultra-light ripstop nylon with a reinforced polyester base, the Lightning combines minimal weight, durable performance and well thought-out design.
Volume
40 l
Min. Weight
S/M: 1115 oz L/XL: 41.1 oz
Max. Weight
S/M: 1145 oz L/XL: 42 oz
Load limit
48.5 lb
Dimensions
25.5 x 12.2 x 9 in
Shell Fabric 1
210 D HMPE ripstop nylon PU coated 1000 mm water column bluesign® approved fabric
Shell Fabric 2
recycled 600 D 82T Polyester PU coated 1500 mm water column bluesign® approved fabric
Frame
6061-T6 aluminum stay
Product with Climate Contribution
EXPED calculates all climate emissions from the production and transportation of this product and finances certified climate protection projects through myclimate to an equal extent.
More and more EXPED products are made from recycled materials. Materials gained from previously made materials -such as PET-bottles or waste from the production of textiles.
Bluesign approved fabric
Bluesign® is the world's strictest textile standard for environmental and consumer protection in the textile industry. All materials of this product which are accordingly labelled are manufactured and approved according to the bluesign® standard.
All EXPED textile products are made without intentionally added PFAS since 2025. We work closely with suppliers and perform independent tests to ensure our products contain zero PFAS.
I like these foldable trail chairs very much. I bought 2 this time round in addition 4 others at home. I used it to sit down to do chores at home especially at low level, gardening (trimming lower branches) and sitting in the park for outdoor photography especially waiting for birds. This reduces the need to squat for long periods of time which is not good for my knees and legs as I grow older.
Andy ChuToday
★★★★★
Delivery was really fast, very convenient!
Translated · See original
物流好快,非常方便!
Darkhan SattursynToday
★★★★★
Great store with very reasonable prices and excellent value for money. The staff were polite, friendly, and helpful throughout my visit. The products were of good quality, and I was happy with my overall experience. I would definitely recommend this store and plan to come back.
Johnson JohnsonToday
★★★★★
Fast delivery.
The product quality is very good.
Customer service replied super efficiently.
Recommended.
Translated · See original
送貨速度快
商品品質很好
客戶回文超效率
推薦
Carol Ng3 days ago
★★★★★
Beautiful colours ,arch support shoes with relatively slim design
Chan Ping Fai6 days ago
★★★★★
i bought Pro-Tec Athletics X-Trac 膝關節支撐, very excellent pick up service
Park Crane6 days ago
★★★★★
I came in. I showed them which backpack I wanted. 5-10 minutes later they brought my order. I checked it, bought it, and voilà. I recommend it 😎
Translated · See original
Przyszedłem. Pokazałem jaki plecak chce. 5-10 min i przynieśli moje zamówienie. Sprawdziłem, kupiłem i voila. Polecam 😎
Tan Anthony Hwa Meng6 days ago
★★★★★
Thanks! Apologies my bad i thought it's at my door way, order well received on time!👏👏
Billy Lee7 days ago
★★★★★
The staff were very friendly.
Translated · See original
服務員態度非常好
Alvin Heung10 days ago
★★★★★
Nice purchase with excellent experience
旮旯發14 days ago
★★★★★
First time buying, tried it a few times, great service. Also able to exchange sizes, thank you 🙏 Fits perfectly now
Translated · See original
第一次購買 試了幾次 好好服務
還可以換尺寸 感謝🙏 現在合適
Serban Grigorescu18 days ago
★★★★★
Great communication! Reasonably priced items and great selection! Highly recommended!!