When you want to run at pace with your kit close to your body, you quickly learn what a vest should and shouldn't do. It has to stay put, nothing may chafe and your drink must be within reach without stopping. That's exactly why we carry Tantrums at Trail.NL.
Tantrums makes light trail vests for runners. The Crest 6 has room for two flasks up front, a reservoir at the back and loops for your poles. Plenty for fast ultras and mountain trails, without a lot of baggage.
For us, Tantrums is mainly a brand for people who want to run light and fast: not much vest, easy to reach and roomy enough for the essentials.