Mammut Macun SO

Warmest softshell


Weight 14 oz


Our take Our testers donned the Macun whenever they were working hard in chilly conditions with uncertain forecasts. It’s highly breathable, the stretchiest jacket in the test, and offers enough weather protection and warmth for year-round use. “It was all I needed over a baselayer on a 25ºF cross-country ski excursion in Montana’s Bitterroot National Forest,” one tester says.

The details The Macun’s DWR fends off light rain for hours. The Macun’s 90-percent polyester, 10-percent spandex material is less crinkly than nylon, and feels soft over bare arms. A two-way main zipper grants access to a climbing harness. Ding: The collar feels uncomfortably tight when zipped all the way up.

Trail cred “The long sleeves allowed me to actually use the thumb holes to layer the jacket under my glove cuffs,” notes a tester.