{"id":964,"date":"2019-01-28T13:48:38","date_gmt":"2019-01-28T12:48:38","guid":{"rendered":"https:\/\/www.weitlaeufer.de\/?page_id=964"},"modified":"2026-08-13T12:31:31","modified_gmt":"2026-08-13T10:31:31","slug":"material-glossary","status":"publish","type":"page","link":"https:\/\/www.weitlaeufer.de\/en\/ultraleicht-rucksack\/material-lexikon\/","title":{"rendered":"Material Lexicon"},"content":{"rendered":"

Welcome to Material Lexicon<\/strong>, your guide to the technical fabrics used in WeitL\u00e4ufer rucksacks. Here, we explain why we rely on selected fabrics such as X-Pac VX21, UltraStretch and Gridstop, and how they strike the right balance between Weight, durability and weather protection<\/strong> hold. Which material suits which rucksack can be read in the Ultralight Backpack Guide<\/a>.<\/p>\n

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Materials in detail<\/h2>\n <\/header>\n\n
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\"Ultra<\/figure>\n
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Ultra 200X<\/h3>\n

Ultra 200X is the successor to the Ultra 200. A newly added Ultra-CrossPly grid<\/strong> increases diagonal stability and minimises the risk of delamination. The fabric consists of 67 % UHMWPE fibres<\/strong>; the fibre is 15 times stronger than steel on a gram-for-gram basis, a comparison drawn from the sailing industry. The material itself is 100 % waterproof and PFAS-free. With 133 g\/m\u00b2<\/strong> remains extremely lightweight, while being more durable and dimensionally stable than its predecessor. With Agilist<\/a> does the entire main subject consist of that.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"X-Pac<\/figure>\n
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X-Pac VX21<\/h3>\n

X-Pac has its origins in sailing. VX21<\/strong> is a four-layer laminate (only 204 g\/m\u00b2) with 210 Denier Nylon<\/strong> as upper material, black X-PLY\u00ae yarn for tear resistance, a 100 % waterproof polyester film<\/strong> for stiffness as well as an additional woven polyester layer inside. The result: high abrasion resistance combined with low weight, and the waterproof film keeps rain completely out. Proven for decades in sailing and on backpacks.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"UltraStretch\"<\/figure>\n
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UltraStretch<\/h3>\n

Our 4-way stretch for exterior pockets: The stretch material is woven into UHMWPE threads<\/strong> woven in, meaning the fabric remains extremely tear-resistant and thorns, rocks or branches cause hardly any damage. Used on base, side, front and shoulder pockets.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"Gridstop<\/figure>\n
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Gridstop 210D<\/h3>\n

A ripstop fabric (132 g\/m\u00b2) made from 100 % recycled nylon, reinforced with white UHMW-PE fibres. This results in a lightweight yet extremely abrasion- and tear-resistant material. On the Agilist model, Gridstop is used in the areas where the rucksack rubs against the rock: the base and the front section.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"3D<\/figure>\n
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3D Mesh & EVA<\/h3>\n

Our shoulder strap pad: the 3D mesh allows air to circulate and wicks away sweat. Inside, 10 mm EVA foam provides long-lasting cushioning. The foam retains its shape, even after many trips.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"X-Pac<\/figure>\n
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X-Pac UX10<\/h3>\n

That's all 85 g\/m\u00b2<\/strong> severe UX10<\/strong>Laminate combined 100 D UHMWPE-Polyester<\/strong> (extremely abrasion-resistant) with X-PLY\u00ae yarn, waterproof polyester film and a slightly transparent look. We use UX10 wherever a pack needs to remain as light as possible without sacrificing weather protection.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"Dyneema<\/figure>\n
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Dyneema Hybrid 50D<\/h3>\n

The 50 denier variant (CT5K.18) weighs only 104 g\/m\u00b2<\/strong>. Construction: 50 D polyester outer fabric, Dyneema\u00ae fibre mesh and waterproof polyester film. The fibre mesh makes the laminate extremely tear-resistant, whilst the polyester outer fabric withstands abrasion well. This means that even an ultra-light pack can withstand contact with rock. Just like the VX21, it has proven itself over decades.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"Dyneema<\/figure>\n
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Dyneema Hybrid 150D<\/h3>\n

With a 150 D polyester outer layer (CT9HK.18), this version \u2248 174\u2013200 g\/m\u00b2<\/strong> onto the scales. The thicker outer layer makes it significantly more abrasion-resistant than the 50D version. We use such heavy hybrids where a rucksack touches down and rubs: on base panels and back panels.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"X-Pac<\/figure>\n
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X-Pac RX15<\/h3>\n

RX15<\/strong> is our most eco-friendly laminate: 100 % post-consumer recycled polyester with a DWR finish and a waterproof film, weighing just 196 g\/m\u00b2. This means you get recycled material without compromising on weight.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"X-Pac<\/figure>\n
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X-Pac RX30<\/h3>\n

Our all-round fabric (262 g\/m\u00b2) made from 100% % recycled polyester \u2013 climate-neutral and abrasion-resistant. A fabric for gear that\u2019s just as suited to everyday city life as it is to a day trip in the Black Forest.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"X-Pac<\/figure>\n
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X-Pac X11<\/h3>\n

Combines a cotton outer material with X3 laminate. Soft to the touch, yet waterproof and dimensionally stable, as well as climate neutral. At 390 g\/m\u00b2, it is our heaviest fabric. We use it where the pleasant feel is more important than every last gram saved.<\/p>\n <\/div>\n <\/article>\n\n \n

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\"Ultra<\/figure>\n
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Ultra 200<\/h3>\n

High-performance laminate from Challenge Sailcloth. Outer layer: 200 D UHMWPE fibres (67 %) & recycled polyester (33 %); inner layer: waterproof PU film. Weighing just 119 g\/m\u00b2, Ultra 200 combines top-class tear and abrasion resistance with sustainability (FC-free C0 impregnation).<\/p>\n <\/div>\n <\/article>\n\n <\/div>\n\n