Salomon S/LAB Ultra 12 - Built for the Long Haul

When the distance gets serious, the vest needs to disappear. The S/LAB Ultra 12 is Salomon's elite-level running vest, developed alongside ultra-trail athletes for the demands of long-distance trail running. At 7oz without accessories, it carries 12 litres of storage without feeling like it.

A Fit That Moves With You

Built from ultralight stretch materials with a seamless construction, the S/LAB Ultra 12 is designed to feel like an extension of the body rather than something strapped to it. Sensifit panels adapt to your shape as you move, minimising bounce and keeping the load stable across technical terrain and sustained efforts. A Quick Link system allows on-the-fly adjustments without breaking stride, and the precise fit keeps everything locked in place from the first climb to the final descent.

12 Litres of Accessible Storage

The storage layout is built around accessibility under effort. Front pouches hold two 500ml soft flasks — both included — for fast hydration without removing the vest. A tunnel pocket on the back handles larger items and additional kit, whilst a removable water-resistant phone bag keeps essentials protected. Everything has a place, and everything stays there across the distance.

Key Features:

- Volume: 12 litres

- Weight: 7oz / 198g (without accessories)

- Weight with accessories: 10.4oz / 295g

- 2 x 500ml soft flasks included

- Seamless ultralight stretch construction

- Sensifit panels for bounce-free stability

- Quick Link on-the-fly adjustment system

- Tunnel pocket on back

- Removable water-resistant phone bag

- Front soft flask pouches

- Unisex fit

- Activity: Trail running

Best For:

- Ultra-distance trail running

- Multi-day running adventures

- Long mountain runs

- Technical trail racing

- High-volume hydration and storage needs

Is the Salomon S/LAB Ultra 12 Right for You?

If you're covering serious distance on trail — whether that's a 50K race, a multi-day effort, or simply long days in the mountains — the S/LAB Ultra 12 is built for exactly that. The 12-litre capacity handles everything from race nutrition to extra layers, whilst the seamless fit and Sensifit panels keep the load stable regardless of terrain. Two soft flasks are included straight out of the box, so it's ready to run from the moment you put it on. For runners who need a capable, comfortable vest that genuinely disappears over the distance, this is a serious option.