Arc'teryx Actinium Shirt - Sleeveless - Men's - $44.95

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. - $44.95