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UltraLight 5L Hydration Running Vest – Zero-Bounce Trail Pack for Long-Distance (Unisex)

Compact 5L vest for short-to-mid distance trail runs, featuring adjustable fit, 11 pockets, and included 500ml soft flasks for hassle-free hydration.
$49.99 $49.99 $59.99
Save $10.00 (-16.67%)
Color: Green
Size M

Run Farther, Train Smarter – Zero Distractions, Total Control

Weighing just 208g (7.34oz), the Haimont UltraLight 5L Vest redefines minimalist agility for ultramarathons, mountain ascents, and endurance trail runs. Built with AI-recommended ergonomics and 360° safety systems, this vest eliminates bounce, friction, and hydration hassles—so you conquer every climb with confidence.

Features

UltraLight, UltraDurable

Crafted from 208g friction-defying nylon, it’s 30% lighter than standard vests yet packs 5L of organized storage across 11 pockets—perfect for gels, phones, and emergency gear. The pack includes storage for two 500ml flasks (included).

Uphill-Proof Stability

  • Expandable chest/waist straps lock water reservoirs in place during steep climbs
  • Bite valve magnetic docking prevents spills and snags on technical terrain
  • 3D ergonomic construction eliminates chafing over 50KM+ efforts

Safety Engineered for Wild Adventures

  • 360° reflective strips for visibility at dawn, dusk, or night
  • Quick-dry back panel with airflow channels cuts sweat buildup by 50%
  • Dual-position trekking pole attachments secure gear in seconds

Adapts Like a Second Skin

The patented adjustment system expands with your body and layers—no mid-run stops to tighten straps.

SPECS

  • Volume: 5L
  • Weight: L: 221g/7.8oz, M: 208g/7.34oz
  • Weight including accessories: L: 289g/10.19oz, M: 72g/9.59oz
  • No. of Pockets: 11
  • Size: M/L
  • Reflectivity: 360° reflective strips
  • Materials: Polyester, Nylon

Washcare

  • Do not bleach
  • Do not dry clean
  • Do not tumble dry
  • Do not machine wash
  • Do not iron
  • Hand wash cold (30°C)

Free shipping on all orders over $60.

Free returns within 30 days. We gladly accept unworn, unwashed items for return of any kind (refund, store credit, or exchange) within 30 days of receipt.

Orders ship from our warehouse within 48 hours of the order being placed (M–F).

For more information on shipping, click here, and for details on returns, click here.

All products are covered by our 2-year limited manufacturer's warranty.
UltraLight Performance
UltraLight Performance

Only 208g for speed & comfort

Adjustable Fit
Adjustable Fit

Side buckles adapt to all body types

Hydration Made Easy
Hydration Made Easy

Includes 2x500ml flasks (bladder optional)

Safety Built-In
Safety Built-In

Reflective strips + emergency whistle

Product benefits

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Breathable & Weather-Ready Protection

3D honeycomb mesh boosts airflow to reduce sweat buildup, while the water-resistant shell shields gear from splashes and light rain.
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Hydration Ready – 2 Free Soft Flasks

Includes two 30g TPU soft flasks with bite-valve for high-flow hydration. Foldable, easy to clean, and space-saving in your pack.
haimont

Trail-Tested 5L Vest in Action

Watch athletes train and race wearing the vest, showcasing stability, breathability, and hydration in real trail scenarios.

Athlete style inspiration

Unisex UltraLight 5L Hydration Running Vest

Unisex UltraLight 5L Hydration Running Vest

Unisex UltraLight 5L Hydration Running Vest

Unisex UltraLight 5L Hydration Running Vest

Frequently asked questions

The Haimont 5L Vest is perfect for short to medium-distance training runs or races from 10km to 25km (approx. 1.5-3.5 hours). For strong runners in good conditions with ample aid stations, it can also handle distances up to 30km.

While it's possible, we don't recommend it. The 5L vest is designed for short distances using the front soft flasks. A bladder takes up crucial space, creates poor weight distribution, and offers less convenient access.

With its adjustable side straps, the Haimont 5L vest offers a secure fit for a wide range of body types, from petite women to taller men. It's ideal for any runner seeking a lightweight solution for short-to-mid distance trail running.

It's a total all-rounder! The 5L vest is incredibly versatile, perfectly balancing lightweight performance and functionality, making it ideal for both racing and daily training. For races, it's your speed tool. For training, it helps you simulate race-day conditions.

Prioritize a secure, bounce-free fit. The vest should feel like a second skin, with no chafing or movement. For storage, ensure it easily holds two 500ml soft flasks upfront and has organized space for gels, your phone, and keys.

It's an ideal choice for beginners! The Haimont 5L vest strikes the perfect balance between a "lightweight feel" and "safety preparedness." It carries essential gear without overwhelm, helping new trail runners build safe habits.

A belt wins on absolute weight. However, the vest often feels lighter because it distributes weight across your torso, minimizing bounce. If minimal weight is your goal for simple runs, choose a belt. For most runs over 10km or on trails, the 5L vest wins on overall comfort and stability.

Not at all! Instability comes from poor fit or packing, not small capacity.​​

Pro Tip for Stability:​​

  • ​​Get the Right Fit:​​ Ensure the vest size matches your torso length. Tighten all straps for a snug fit.
  • ​​Pack Smart:​​ Put heavy items high and to the front (flasks, phone). Light, bulky items (jacket) go in the back.
  • ​​Fill the Space:​​ Use a light item like a jacket to fill space and prevent shifting.