Arc'Teryx Acto MX Mens Jacket Spring Capilene® Lightweight is our lightest-weight

Capilene® Lightweight is our lightest-weight

Also included is a Quick Connect bottle adaptor—allowing direct connection to all MSR® hydration products and a variety of other "wide mouth" containers—and an advanced prefilter to prolong the life of your filter

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From Southern Grind:

Arc'Teryx Acto MX Mens Jacket Spring Capilene® Lightweight is our lightest-weightHighly breathable, air permeable, mid layer hardfleece jacket that provides bulk free warmth for all day activity. Perfect for climbing and ski touring in mixed weather, this new jacket represents our most advanced hardfleece layering concept yet. Trim fitting and designed for the fast and light specialist who keeps on the move all day long, the Acto provides outstanding ventilation, bulk free warmth, and the weather protection of snow shedding Aerius