This is how you choose the right race vest for trail running [2025 guide]

A good race vest is essential for every trail runner. Whether you're running a short 10K or a 100-mile ultra, the right vest provides comfort, safety, and ample storage. In this blog post, we'll explain what to look for when buying a race vest, so you make the perfect choice for your trail adventures.

A racing vest It should fit snugly against your body without being constricting. This prevents chafing and bouncing while running. Look for adjustable chest straps (often two or three) and side drawstrings. These help ensure the vest fits perfectly to your body. There are also special women's models with a different cut and a modified position of the chest straps.

It varies greatly by brand. Some brands, like Salomon, come in as many as five sizes. Others, like Instinct, only come in one size and are highly adjustable.

Tip: Try on the vest with filled soft flasks or other gear inside. This way, you'll really get a feel for how it fits while running. We have full flasks in our store for you to try on and test.

Race vests come in various capacities, from 3 liters to as much as 40 liters. As a guide, consider three categories for your race vest:

• About 5 liters: Ideal for short trail runs or races where you need minimal gear. This is often enough for two soft flasks, some nutrition, and your phone.
• About 12 liters: Suitable for longer training sessions or races up to 100 km, where you need to carry extra layers, nutrition and sometimes mandatory equipment.
• About 20 liters: Perfect for longer ultras or self-supported treks. It holds rain gear, first aid kit, food, water, and other gear.

Most race vests are designed for soft flasks (usually 2 x 500 ml) on the front. Check if these are included or need to be ordered separately. If you prefer to carry a hydration bladder on your back, check if the vest is compatible. Most vests have a hook on the back that fits 95% of reservoirs/bladders.

Also, pay attention to how easily you can access water while walking. Soft flasks can be refilled without removing the vest. With a large reservoir on your back, this is more difficult.

Good racing vests have clever pockets and storage options:

• Front pockets for soft flasks, power supply, telephone or a small camera.
• Side pockets with stretch fabric for gels or gloves.
• Large back pocket for rain gear or mandatory items such as a first aid kit or headlamp.
• Pole carry Some models have a system for carrying your poles on your chest or back. So if you have poles, make sure they can be carried.