[{"id":234523754648,"handle":"backpacks","title":"BACKPACKS","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2021-01-06T08:59:31-07:00","sort_order":"price-desc","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Shop: Backpacks"}],"published_scope":"web","image":{"created_at":"2021-01-06T11:27:37-07:00","alt":null,"width":2000,"height":797,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/Backpacks_collection.jpg?v=1610908152"}},{"id":442777567465,"handle":"black-friday-sale-25-off","title":"Black Friday Sale (25% off)","updated_at":"2025-08-22T05:05:53-06:00","body_html":"\u003cp class=\"MsoNormal\"\u003eGear up for the holidays with our exclusive sitewide sale featuring products that rarely go on sale! Enjoy significant savings on essential gear to prepare you for any adventure. Don’t miss this limited-time opportunity to elevate your outdoor essentials! Shop now and save big!\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" align=\"center\" style=\"text-align: center;\"\u003e\u003ci\u003e*DISCOUNT APPLIED IN CART*\u003c\/i\u003e\u003c\/p\u003e","published_at":"2024-11-01T12:17:31-06:00","sort_order":"price-desc","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Inline"}],"published_scope":"web","image":{"created_at":"2024-11-01T12:17:30-06:00","alt":null,"width":3000,"height":2000,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/AGR_1280NEW.jpg?v=1730485051"}},{"id":401545756905,"handle":"free-shipping","title":"Free Shipping","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2022-03-17T11:37:11-06:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"variant_price","relation":"greater_than","condition":"79"},{"column":"variant_inventory","relation":"greater_than","condition":"1"}],"published_scope":"web"},{"id":278412951704,"handle":"gear-spotlight","title":"Gear Spotlight","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2021-10-26T12:45:17-06:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"variant_inventory","relation":"greater_than","condition":"0"}],"published_scope":"web"},{"id":234523918488,"handle":"all-terrain-backpacks","title":"HIKING BACKPACKS","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2021-01-06T08:59:37-07:00","sort_order":"price-desc","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Shop: Hiking Backpacks"}],"published_scope":"web","image":{"created_at":"2021-01-06T11:26:32-07:00","alt":null,"width":2000,"height":797,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/Backpacks-Hiking-collection.jpg?v=1609957593"}},{"id":444427469033,"handle":"holiday-gift-guide","title":"Holiday Gift Guide","updated_at":"2025-08-22T05:05:53-06:00","body_html":"\u003cp class=\"MsoNormal\"\u003eThis curated gift guide collection is the perfect selection for outdoor enthusiasts, featuring a variety of top-quality gear to enhance every adventure. From lumbar packs for easy, lightweight carrying to sturdy hiking backpacks designed for comfort and durability on the trails, there's something for every type of trekker. For pet lovers, our innovative K9 pack allows your dog to join in on the fun, while keeping them comfortable. Whether you're exploring the woods, climbing mountains, or camping under the stars, this guide offers all the essentials to make every outdoor experience memorable. Give them the gift they really want this holiday season, with gear designed to make their adventures even better.\u003c\/p\u003e","published_at":"2024-12-03T12:00:04-07:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Gift Guide"}],"published_scope":"web","image":{"created_at":"2024-12-03T12:27:07-07:00","alt":null,"width":3000,"height":2000,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/Copy_of_Gift_Guide_1.png?v=1733254526"}},{"id":438421651689,"handle":"labor-day-sale-25-off","title":"Labor Day Sale (25% off)","updated_at":"2025-08-22T05:05:53-06:00","body_html":"\u003cp data-start=\"216\" data-end=\"264\" style=\"text-align: center;\"\u003e\u003cstrong data-start=\"216\" data-end=\"264\"\u003eCelebrate Labor Day with Our Exclusive Sale!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"266\" data-end=\"637\" style=\"text-align: center;\"\u003eUnlock incredible savings on top-tier gear that rarely goes on sale! For a limited time, enjoy big savings on essential products designed to elevate your next adventure. Whether you're prepping for your next trip or upgrading your collection, now is the perfect time to shop. But hurry, this offer won’t last long! *\u003cem data-start=\"585\" data-end=\"637\"\u003eNote: Evo Series items are excluded from the sale.*\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-start=\"118\" data-end=\"403\" style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"118\" data-end=\"403\" style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0); background-color: rgb(255, 255, 0);\"\u003e\u003cstrong\u003e\u003cem data-start=\"488\" data-end=\"519\"\u003eDiscount applied at checkout.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","published_at":"2024-08-14T11:19:17-06:00","sort_order":"alpha-asc","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Inline"},{"column":"variant_compare_at_price","relation":"equals","condition":"0"}],"published_scope":"web","image":{"created_at":"2024-08-14T12:28:56-06:00","alt":null,"width":3000,"height":2000,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/NEW_Pic_1.jpg?v=1723660137"}},{"id":451511025897,"handle":"memorial-day-sale-25-off","title":"Memorial Day Sale (25% Off)","updated_at":"2025-08-22T05:05:53-06:00","body_html":"\u003cp data-start=\"163\" data-end=\"498\" class=\"\" style=\"text-align: center;\"\u003e\u003cstrong data-start=\"163\" data-end=\"232\"\u003eGear up for the season with rare savings on adventure essentials.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"163\" data-end=\"498\" class=\"\" style=\"text-align: center;\"\u003eIn honor of Memorial Day, we’re offering 10 days of (almost) sitewide savings. It’s the perfect time to upgrade your gear and get ready for wherever the summer takes you, while taking a moment to reflect on those who served.\u003c\/p\u003e\n\u003cp data-start=\"500\" data-end=\"547\" class=\"\" style=\"text-align: center;\"\u003e\u003cem data-start=\"500\" data-end=\"547\"\u003eAutomatic discount applied in cart. Limited-time offer.\u003c\/em\u003e\u003c\/p\u003e","published_at":"2025-04-30T16:10:33-06:00","sort_order":"price-desc","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Inline"}],"published_scope":"web","image":{"created_at":"2025-04-30T16:11:06-06:00","alt":null,"width":5712,"height":4284,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/Photo_Jun_28_2024_7_06_10_PM.jpg?v=1746051066"}},{"id":234528407704,"handle":"new-gear","title":"NEW GEAR","updated_at":"2025-08-22T05:05:53-06:00","body_html":"\u003cp\u003e\u003c\/p\u003e","published_at":"2021-01-06T09:02:29-07:00","sort_order":"manual","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Shop: NEW GEAR"}],"published_scope":"web","image":{"created_at":"2021-01-06T10:01:59-07:00","alt":null,"width":5568,"height":3712,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/New_for_2020.jpg?v=1708556632"}},{"id":260899471512,"handle":"pro-discount","title":"Non Discount Products","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2021-03-02T07:58:45-07:00","sort_order":"price-desc","template_suffix":"","disjunctive":true,"rules":[{"column":"variant_compare_at_price","relation":"equals","condition":"0"},{"column":"is_price_reduced","relation":"is_not_set","condition":""}],"published_scope":"web"},{"id":234523721880,"handle":"products","title":"SHOP","updated_at":"2025-08-22T05:05:53-06:00","body_html":"\u003cstrong\u003ePlease choose a product type from the menu on the left to narrow down your selection.\u003c\/strong\u003e","published_at":"2021-01-17T11:44:24-07:00","sort_order":"alpha-asc","template_suffix":"","disjunctive":false,"rules":[{"column":"variant_price","relation":"greater_than","condition":"1"},{"column":"variant_inventory","relation":"greater_than","condition":"1"}],"published_scope":"web","image":{"created_at":"2021-01-17T11:41:41-07:00","alt":null,"width":2000,"height":797,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/Shop_Category_Image_1-17-2021.jpg?v=1610908902"}},{"id":204574720152,"handle":"all","title":"Shop Mountainsmith","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2020-07-01T13:47:23-06:00","sort_order":"best-selling","template_suffix":"","disjunctive":true,"rules":[{"column":"variant_price","relation":"greater_than","condition":"1"},{"column":"variant_inventory","relation":"greater_than","condition":"1"}],"published_scope":"web"},{"id":433323802857,"handle":"sitewide-sale-1","title":"Sitewide Sale","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2024-05-14T14:47:54-06:00","sort_order":"manual","template_suffix":"","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"Inline"},{"column":"variant_compare_at_price","relation":"equals","condition":"0"}],"published_scope":"web"},{"id":401598120169,"handle":"spring-collection","updated_at":"2025-08-22T05:05:53-06:00","published_at":"2022-03-18T15:29:45-06:00","sort_order":"manual","template_suffix":"","published_scope":"web","title":"Spring Collection","body_html":"","image":{"created_at":"2022-03-21T12:45:08-06:00","alt":null,"width":1800,"height":660,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/MS_MAR22-SpringGear-CollectionBanner_1800x660_8883f1bd-31df-458c-8270-a114a129d8d6.jpg?v=1647888309"}},{"id":406700425449,"handle":"summer-collection","title":"Summer Collection","updated_at":"2025-08-22T05:05:53-06:00","body_html":"","published_at":"2022-06-23T12:25:07-06:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"variant_inventory","relation":"greater_than","condition":"0"}],"published_scope":"web","image":{"created_at":"2022-06-30T09:00:29-06:00","alt":null,"width":1800,"height":660,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/Mountainsmith_CollectionBanner_GearforSummer_1800x660_a696a826-f30e-49dd-965b-58d82c65a384.jpg?v=1656601230"}},{"id":269036748952,"handle":"summer-essentials","updated_at":"2025-08-22T05:05:53-06:00","published_at":"2021-06-07T16:57:51-06:00","sort_order":"manual","template_suffix":"","published_scope":"web","title":"Summer Essentials","body_html":""},{"id":435561464041,"handle":"zerk-series","updated_at":"2025-08-20T05:06:22-06:00","published_at":"2024-06-25T13:42:41-06:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Zerk Series","body_html":"","image":{"created_at":"2025-03-04T13:17:38-07:00","alt":null,"width":3000,"height":2000,"src":"\/\/mountainsmith.com\/cdn\/shop\/collections\/NEWAGR_1238.jpg?v=1741119458"}}]
["FathersDay","Gift Guide","Inline","Shop","Shop: Backpacks","Shop: Hiking Backpacks","Shop: NEW GEAR"]
Due to internal system updates, there may be a slight delay in order processing and shipping during this time. We’re working to get everything out as quickly as possible and appreciate your patience and understanding!
Due to internal system updates, there may be a slight delay in order processing and shipping during this time. We’re working to get everything out as quickly as possible and appreciate your patience and understanding!
Co-designed with Former Marine and renowned thru-hiker The Real Hiking Viking, the updated ZERK 40 pack stands alone as the ideal combination of lightweight durability, comfort, and accessibility. New updated version includes added daisy chain attachment points, dual ice axe loops, dual side compression straps, and embroidered design.
Co-designed with The Real Hiking Viking, a prominent long distance hiking machine, this pack was developed over two years with one mission; to go faster, further, and lighter. After over5000 miles of testing in the Rockies, this pack is on its 5th generation of design upgrades. Built withultra-light and durable materials, the Zerk 40 will be your best friend and greatest asset when out on the trail.
FEATURES
1.5” removable waistbelt
Large main compartment holds up to 40 liters of gear
Roll top closure with side compression SR buckles. Opposing SR buckles for self-closing roll top
Side compression straps for securing load throughout entire pack
Large side water bottle pockets with angled opening to easily remove and insert items while on the go
Expansive front mesh pocket for hauling bulky gear
Large mesh side stash pockets with angled opening for easy reach
Reflective screen printing and cord loops for low light visibility
Front cord loops can be configured with bungee cord (included)
Removable interior laser cut frame sheet (EVA Atilon) allows for rigidity and airflow
Alas! This backpack is great in many ways, but as the name ZERK suggest, you need the build of a Berserker. Dear Mountainsmith: how about a version with a harness fit for the smaller Berserkers among us? Not all heroes come in XL.
B
Brittney
Bag does not fit store will not help
I looked at my last review & noticed you used pictures that are not mine ? That is not the bag i purchased store will not refund my bag for a proper bag that fits i tried the bag on it felt like it would fit once taking it out & filling my gear with it it sat below my butt after. the straps will not adjust properly to pull the bag up & tighten it the shoulder straps do not adjust either
B
Brittney
Too big for me sadly I used it the the first time hiking Mount
I used it the the first time hiking Mount Williamson it was too big for me it sits below my butt i didn’t like it at all I think it was made for a guy not a female it was very expensive for a one time use
H
Hammock Camper
My New Favorite Pack
This pack (the Zerk 40) checks all the boxes! It's lighter and comfier than my more expensive 40L dyneema pack. And it's so much quieter! Lately the loud crinkling noise of dyneema has really been getting on my nerves. The Zerk is much better for stealth camping and just generally not making a ton of noise around camp. My minifly tarp, stake bag, and 15 ft hammock straps all fit easily in the generously sized mesh outer pocket, and the mesh - like everything on this pack - is nice and strong, no worries at all about tearing. The icing on the cake is the chest strap pockets. There's a double pocket on each strap, so 4 pockets total. Again, generously sized. My smart phone (3 1/8" x 6 3/8" with protective case) slides easliy into any one of the 4 pockets, with no effort at all. I can put my phone in the inner pocket and still fit a pair of reading glasses in the outer pocket on the same strap. A small plastic water bottle (16.9 oz) will fit in a chest pocket, with minimal effort and stretching. The daisy chain loops are genius and make it super easy to clip quick-access items to the outside of the pack with a carabiner, like cordage, a headlamp, or a small knife. The roll top is quick and easy to close. You can clip the two ends together, one quick snap. Or you can clip them to the sides and cinch it down. There's a top strap if you want to strap down a foam sleeping pad. This just might be the perfect pack!!
The Zerk 40 was awarded The Best Fast and Light Pack by The Trek. It is featured in their Best Backpacks for Thru-Hiking of 2022.
CALIFORNIA WARNING: Cancer and Reproductive Harm | www.P65Warnings.ca.gov
