# 5L Hydration Running Vest Backpack - Lightweight Reflective Trail Hiking Pack, Black ## 5L Hydration Running Vest Backpack - Lightweight Reflective Trail Hiking Pack There is a moment on every long run where the pack you chose either disappears or ruins the day. This 5-litre hydration running vest is built to disappear. It hugs the torso like a second layer rather than swinging off your shoulders, so the rhythm you worked hard to find stays unbroken from the first kilometre to the last. Air-padded mesh shoulder panels breathe against the skin, the X-buckle chest straps pull the load in tight, and twin stretch pockets keep bottles exactly where your hands already expect to find them. Pull it on for a dawn trail loop, a half marathon, a cycling commute or a day hike, and it simply gets on with the job. Finished in matte black with bright reflective panels and a bold JUST RUN print, it is made from lightweight, breathable polyester fibre that shrugs off trail dust and sweat. At only 280 g empty, it carries a phone, keys, gels, a light shell and your hydration without ever feeling like cargo. ### Key Features - **5 L running vest capacity** - enough for hydration, phone, keys, energy gels and a packable layer, with nothing left rattling around. - **Air-padded breathable shoulder straps** - perforated mesh panels across the shoulders reduce heat build-up and hot spots on long efforts. - **Twin front bottle pockets** - deep stretch pockets on both sides of the chest keep soft flasks or bottles within instant reach, no stopping required. - **Dual X-buckle chest straps** - two independently adjustable sternum straps lock the vest down so it never bounces on descents. - **Night-time safety reflective trim** - reflective strips on the front, shoulders and back catch headlights during early mornings and evening runs. - **Zippered chest pockets** - secure side zips swallow a phone or wallet and keep it flat against the body. - **Ultra-lightweight at 280 g** - load-reducing construction in breathable polyester fibre you barely register wearing. - **Unisex fit** - one adjustable size designed for both men and women. ![Black 5L hydration running vest backpack with reflective JUST RUN print, front view](https://cdn.shopify.com/s/files/1/0715/8595/6114/files/945e43c6-6833-4777-bd9b-2518b76a39c8.jpg?v=1789679279) ![Running vest backpack rear view showing twin bottle pockets and X-buckle chest straps](https://cdn.shopify.com/s/files/1/0715/8595/6114/files/3a7c255f-8f73-44c2-b150-55552d4cd043.jpg?v=1789679279) ### Who This Is For - Trail and road runners who need hands-free hydration on 5K to marathon distances. - Hikers and day walkers who want a minimalist pack instead of a bulky rucksack. - Cyclists and commuters looking for a low-profile, reflective carry option. - Early-morning and after-dark athletes who need to be seen by drivers. - Gym, obstacle-race and fitness users who want essentials strapped close to the body. ### Product Details Specification Detail Capacity 5 litres Colour Black (without water bag) Material Polyester fibre Lining Polyester fibre Pattern Solid colour with reflective print Carrying system Air-padded shoulder straps, dual chest straps Weight 280 g Gender Unisex Use Running, trail, hiking, cycling, outdoor sports In the box 1 x running vest backpack ### Fit and Adjustable Range This vest is supplied in a single adjustable size. The measurements below are taken directly from the manufacturer's fit chart. Size Underarm measurement (circumference) cm Underarm measurement (circumference) inch NS (one size) 79-119 31-47 Measure around your torso under the arms and across the chest. If you fall inside the 79-119 cm range, the chest straps will bring the vest to a snug, bounce-free fit. ![Runner wearing the hydration vest on a forest trail with adjustable fit range chart](https://cdn.shopify.com/s/files/1/0715/8595/6114/files/8d1ef30b-376e-47b9-b4e9-96a020a2d519_trans.jpg?v=1789926836) ![Front and side views of the lightweight black running vest backpack](https://cdn.shopify.com/s/files/1/0715/8595/6114/files/4ffee339-6777-46ca-8e3d-93664714f59f.jpg?v=1789926835) ![Side profile and flat back view of the 5L hydration running vest](https://cdn.shopify.com/s/files/1/0715/8595/6114/files/b39921fe-ddbd-402e-947f-ff0c36638d1a.jpg?v=1789926836) ![Angled view of the running vest backpack showing mesh back panel and zip pockets](https://cdn.shopify.com/s/files/1/0715/8595/6114/files/389f361e-3a29-4d03-b73b-1ff2975de9c7.jpg?v=1789679280) ### Why EX-STOCK - Free shipping on orders over $25 to Canada & USA - delivered in 6-12 business days. - 90-day return policy so you can test the fit on a real run before committing. - Tracked delivery with order updates from dispatch to doorstep. - Secure checkout and responsive Canadian-based customer support. - Curated outdoor gear, not a random marketplace listing. Round out your kit from our [sports and outdoors gear collection](/collections/sports-outdoors), browse more carry options in [luggage and travel bags](/collections/premium-luggage-bags-for-travel), or see everything fresh in [this month's new arrivals](/collections/new-arrival-collection). Runners often pair this vest with the [slim running and jogging belt waist bag](/products/fitness-waist-bag-with-pocket-slim-running-jogging-belt-fanny-pack-bag-for-hiking-cycling-workout-sports-gym) for shorter sessions, the [running wrist water bottle](/products/outdoor-cycling-sports-water-cup-running-wrist-water-bottle-fitness-portable-water-bottle-bicycle-accessories-sport-gym) for quick hydration, the [aluminum sports water bottle](/products/sports-water-bottle-male-aluminum-bicycle-outdoor) for trail and bike days, and the [multifunctional sports chest pack](/products/mens-multifunctional-shoulder-bags-sports-chest-pack-bags) for everyday carry. ### Frequently Asked Questions **Does this vest include a water bladder?** No. This version is supplied as the black vest without a water bag. The twin front pockets hold soft flasks or bottles, and the pack is routed for a hydration tube if you add your own reservoir. **Will it bounce while I run?** The two X-buckle sternum straps adjust independently and cinch the vest against the torso, which is what stops the bounce. Tighten the upper strap first, then the lower one. **Is it suitable for both men and women?** Yes. It is a unisex design in one adjustable size covering an underarm circumference of 79-119 cm (31-47 in). **Is it safe for running at night?** Reflective strips run across the chest, shoulders and back so headlights pick you up in low light. It is a visibility aid, not a substitute for a head torch on unlit trails. **How long does delivery take to Canada and the USA?** Free shipping on orders over $25 to Canada & USA - delivered in 6-12 business days, with expedited delivery in 5-9 business days. ## Details - **Price:** 29.99 CAD - **Vendor:** EX-STOCK - **Type:** Hydration Pack ## Variants | Variant | Price | Available | |---------|-------|-----------| | Black Without Water Bag / 5 Liters | 29.99 CAD | In stock | ## Images - A composite product listing image showing a running backpack worn by a male runner in forest trails, with front and back views, size information, and close-up detail panels. The image includes a red header and measurement overlay. - 5L Hydration Running Vest Backpack - Lightweight Reflective Trail Hiking Pack, Black - A four-panel collage showing a running hydration backpack worn by athletes. The top panels show close-ups of a black and white 'JUST RUN' backpack on a runner's chest, while the bottom panels show a man and a woman hiking outdoors wearing the backpacks, one in black and one in pink. - 5L Hydration Running Vest Backpack - Lightweight Reflective Trail Hiking Pack, Black - 5L Hydration Running Vest Backpack - Lightweight Reflective Trail Hiking Pack, Black - 5L Hydration Running Vest Backpack - Lightweight Reflective Trail Hiking Pack, Black 3 - A black running hydration backpack with white accents and the brand name 'JUST RUN' printed vertically in white on the front, shown in two views against a plain white background. - Black hydration vest with multiple pockets and straps on a white background - Black hydration backpacking vest shown from two angles (front and back) on a plain white background. - A composite product listing image showing a black hydration backpack worn by a man, with additional text and a small product diagram below. The main visual is the man wearing the backpack, and the image includes descriptive text blocks and a size/parameters panel. ## Additional Information - **Care guide:** Hand wash in cool water with mild detergent. Do not machine wash, tumble dry, bleach or iron. Empty all pockets and remove any bottles before washing. Rinse off trail dust, sweat and salt after heavy use. Air dry fully in the shade before storing; drying in direct sunlight or near heat can weaken the polyester fibre and reflective trim. Store loosely in a dry place rather than compressed, and check buckles and straps for grit before each run. - **Delivery :** Free shipping to Canada and USA in 6-12 business days. Expedited 5-9 business days. - **return refund policy:** EX-STOCK Canada offers a 90-day return policy on this product. If you are not satisfied with your purchase, contact us within 90 days of delivery for a full refund or exchange. Items must be returned in original, unused condition. Return shipping costs may apply. --- > Source: [EX-STOCK Canada](https://www.ex-stock.com/products/hydration-running-vest-backpack-5l-trail-hiking) > Updated: 2026-09-21