{"product_id":"zerk-55-ul-backpack","title":"Zerk 55 UL Backpack","description":"\u003ch2\u003eGo ahead, take some extra luxuries...Grueling trails don't stand a chance against our all new ZERK 55!\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eZERK 55L\u003c\/strong\u003e, the original cornerstone of our ZERK UL Series, has been tested \u0026amp; developed thru 10's of thousands of thru-hiking miles and co-designed with \u003ca href=\"https:\/\/www.instagram.com\/therealhikingviking\/\" title=\"The real Hiking Viking Instagram account\"\u003e\u003cstrong\u003eThe Real Hiking Viking\u003c\/strong\u003e\u003c\/a\u003e (AKA Jabba). When the goal is to hike faster, longer and with more efficiency, consider this award winning pack on your next ultralight adventure. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor this newly updated version, we've added new Zerk accessory compatibility and included modular compressions straps and field serviceable bungees; not only increasing your versatility on the trail, but also allowing you to strip the weight when thru-hike minimalism is key. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003cstrong\u003eAdditional upgrades for 2026:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMaterials upgraded to Robic® Nylon X-Grid Extreema (UHMWPE) Ripstop with UTS coating for both the 210d fabric (bottom panel, backpanel and reinforcement areas) and 100d fabric (main body)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUltra durable Spundura stretch mesh pockets with UHMWPE grid in key wear areas (Side bottle pockets and front panel sleeve pocket)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdditional upper side panel stretch mesh pockets for quick access, on-the-go items (avocados anyone?)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA new front panel zippered security pocket for improved organization of trail valuables\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompatibility with our new \u003ca href=\"\/products\/zerk-3l-loki-lumbar\" title=\"Zerk 3L Loki Lumbar pack\"\u003e\u003cstrong\u003eZerk 3L Loki Lumbar\u003c\/strong\u003e\u003c\/a\u003e pack which acts as a chest rig on the ZERK 40 shoulder straps or carry it stand alone with the existing ZERK 40 waistbelt; enabling you to pack the Loki Lumbar as an organizer pouch and then use it as a stand alone lumbar pack for side trips from base camp without carrying an extra waistbelt!\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCompatibility with our new \u003ca href=\"\/products\/zerk-7l-toplid\" title=\"Zerk 7L Toplid accessory\"\u003e\u003cstrong\u003eZerk 7L Toplid\u003c\/strong\u003e\u003c\/a\u003e accessory, increasing your carrying capacity by an additional 7L\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChanged interior pattern volume to better accommodate some makes of 700 in\u003csmall\u003e\u003csup\u003e3\u003c\/sup\u003e\u003c\/small\u003e sized bear canisters\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mountainsmith","offers":[{"title":"MD \/ DARKNIGHT","offer_id":50461303406825,"sku":"26-50642-01","price":279.95,"currency_code":"USD","in_stock":true},{"title":"LG \/ DARKNIGHT","offer_id":50461307109609,"sku":"26-50641-01","price":279.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0418\/4971\/6888\/files\/26-50642-01_Zerk_55_Darknight-MD_Main.png?v=1790198131","url":"https:\/\/mountainsmith.com\/products\/zerk-55-ul-backpack","provider":"Mountainsmith","version":"1.0","type":"link"}