We take on fun-filled days exploring cold, mountain environments with the Mammut Aenergy FL Half-Zip Long-Sleeve as our base. Crafted with smooth, flat seams that follow our every move, as well as recycled materials, this layer provides a soft, chafe-free fit and feel that’s also eco-friendly. As we test our grit, the recycled fibers wick and dry at remarkable speed, ensuring we don’t overheat or freeze, while the odor-fighting treatment lets us keep our friends close.
- Lightweight 1/2-zip layer for comfort during high-output pursuits
- Recycled material is breathable and moisture managing
- HeiQ Fresh treatment helps fight off odors to stay fresh
- Reflective details increase your visibility in low light
- Strategically placed mesh panels enhance breathability
- Smooth merrow-stitched seams reduce bulk and friction
- Semi-fitted design slides easily under layers
- Item #MAMU5M8
- Responsible Collection
- Recycled/Repurposed
- Material
- 100% recycled polyester
- Insulation Weight
- lightweight
- Fit
- semi-fitted
- Style
- 1/2-zip
- Anti-Odor
- HeiQ Fresh
- Claimed Weight
- 4.7oz
- Activity
- hiking, skiing, snowboarding, climbing
- Manufacturer Warranty
- 2 year limited


















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