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.
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
50 l
Min. Weight
S/M: 40.7 oz L/XL: 42.7 oz
Max. Weight
S/M: 41.8 oz L/XL: 43.7 oz
Load limit
48.5 lb
Dimensions
27.5 x 13.7 x 9.8 in
Shell Fabric 1
210 D HD 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.
¡Recibí mis zapatillas en una semana desde el pedido! Gran calidad y la comunicación con Hillmalaya fue buena, siempre actualizando el estado del pedido por correo electrónico y mensajes. ¡Gracias!
Traducido · Ver original
Received my shoes within a week of order! Great quality and communication with Hillmalaya was good, always updating order status via email and messages. Thank you!
Oscar Chenghace 1 día
★★★★★
Recibí el pedido muy rápido 👍👍👍
Traducido · Ver original
好快收到貨👍👍👍
紫卡hace 3 días
★★★★★
Al preparar el envío, la tienda detectó un problema con el producto y solo lo envió después de resolverlo, para evitar molestias al cliente más adelante. Muy buena actitud de servicio 👍🏻👍🏻
Traducido · Ver original
出貨時商家發現商品有問題 處理好後才送出 貨以免日後客人處理麻煩 很好的服務態度👍🏻👍🏻
Chan YM Anthonyhace 3 días
★★★★★
La chaqueta es bonita y de buena calidad
Traducido · Ver original
The jacket is nice and good quality
PRINCE Fung Wonghace 4 días
★★★★★
Muy bueno, he comprado muchas veces en esta tienda. La calidad es buena y hay muchas marcas y modelos. Esta vez compré un par de Normal Tomir 2.0 nn. Elegí nn, que significa no impermeable, y es un poco más ligero que el impermeable. Personalmente creo que, para el clima de Hong Kong, sin impermeabilidad es mejor, porque es más transpirable.
Traducido · Ver original
非常好,多次在這店購買,品質好,牌子款式多,這次買了對Normal tomir 2.0 nn . 我買nn 意思係不防水,比防水的輕少少,個人感覺香港天氣不防水更好,透氣度高啲
JProject史提夫hace 6 días
★★★★★
¡Rapidísimo y buenísimo!
Traducido · Ver original
快靚正
Foo Hee Senghace 6 días
★★★★★
Es la tercera vez que compro en Hillmalaya, productos de muy buena calidad.
Traducido · Ver original
This is the third time buying from Hillmalaya very good quality products
Michael Lihace 7 días
★★★★★
Es fácil conseguir el envío gratis, entrega rápida, buen precio.
Traducido · Ver original
Easy to get free shipping, fast deliver, good price.
Sammy Lauhace 7 días
★★★★★
Los productos son buenos y populares, y los precios también son razonables. ¡Una buena experiencia comprar aquí!
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Products are good and popular, prices also reasonable. Good experience to shop here!
Ke Lihace 7 días
★★★★★
Rápido, preciso.
Traducido · Ver original
快,準
Hisham Dimashkiehhace 8 días
★★★★★
Una gran tienda con un gran equipo original a mejores precios que en el mercado. El equipo de soporte y administración es muy atento y responde con rapidez. Estoy contento con mi compra y sin duda volveré a comprar en Hillmalaya en el futuro.
Traducido · Ver original
Great Store with Great Original Gear at better prices than the market. The support and admin team are very attentive and responsive. I am happy with my purchase and will definitely buy from Hillmalaya in the future
wt Tsanghace 8 días
★★★★★
La entrega fue muy rápida, y cuando hubo un problema con el paquete durante el trayecto, se resolvió de forma proactiva y rápida 👍🏻👍🏻👍🏻