A nice button-down shirt is an absolute essential in every man’s wardrobe. But all button-downs are not created equal. Named for the sweat-preventing 37.5® Technology woven into the fabric, the Mack Weldon 37.5 Oxford outperforms everything else in your closet. In addition to keeping you cool and dry in the underarms, this high performance shirt is machine washable and wearable right out of the dryer so no more trips to the dry cleaner. The classic fit also means it looks great whether you’re wearing it tucked or untucked. It’s the wardrobe upgrade you’ve been waiting for.