Arc'teryx Actinium Sleeveless

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Hot days call for a cool, comfortable shirt, and the Arc'teryx Men's Actinium Sleeveless Shirt uses quick-wicking, ventilated material to keep you going when the temperature rises. Whether you're working out in a hot, sweaty gym or pushing through a 20-mile day with a backpack strapped to your back, this shirt will help you stay cool.


The Arc'teryx Actiniums Sleeveless Top is a lightweight, highly air permeable, mesh sleeveless running top that keeps your body cool in hot weather. The fabric is treated with anti-microbial finish which reduces odor and flatlock seams prevent chafing.


On Sale. Arcteryx Men's Actinium Sleeveless FEATURES of the Arcteryx Men's Actinium Sleeveless Mesh fabric with wicking finish transfers moisture for rapid evaporation/cooling Fabric is treated with anti-odour and wicking finish Relaxed cut encourages air flow through the garment for cooling Strategic flatlock construction reduces chafing SPECIFICATIONS of the Arcteryx Men's Actinium Sleeveless Weight: 4.2 oz / 120 g Fit: Relaxed Viente - 100% polyester ARC'TERYX RELAXED FIT: Arc'teryx relaxed fit garments rely on both articulation and higher volume patterns to provide better comfort and mobility. This is a looser fit that provides room for a base layer plus a thick cold weather mid-layer. If you will NOT wear this style over a base or mid-layer, you may consider sizing down if you prefer a closer fit. Check out the size guide to learn how to calculate your body measurements before selecting a size. This product can only be shipped within the United States. Please don't hate us.

- Moosejaw

A smartly designed, high-performance top from Arc'teryx, the men's Actinium Sleeveless Shirt helps you stay comfortably cool during tough workouts on warm days.