Mammut

Aenergy 12L Trail Vest

What Our Gearhead® Experts Are Saying:

"I love this vest for long trail sessions because it balances really well, even when all the pockets are full. The updated 3-point tightening system keeps everything locked down without squeezing, and the mix of stretch and zip pockets is perfect for flasks, gels, or a phone. The airflow through the 3D mesh back panel is a lifesaver on hot days."

We reach for the Aenergy 12L Trail Vest when speed, efficiency, and access matter most. Built from durable ripstop fabric and backed by a breathable 3D mesh panel, it keeps us cool and comfortable while hauling the essentials through big mountains and hot training days. With 12 liters of storage and pockets at every angle, this vest makes it easy to grab gels, soft flasks, gloves, or a wind shell without stopping the pace.

A reworked fit and a stable 3-point tightening system help the vest ride smoothly against the body—even when fully loaded for long pushes or race days. Smart storage includes front stretch pockets, secure front zips for a phone, a shoulder zip for keys, and a back tunnel pocket for quick-access layers. Pole-carry options and quiver compatibility expand its versatility, while an integrated RECCO reflector adds a touch of safety when we're deep into adventure. The Aenergy is built for the kind of days where “fast and light” truly pays off.