This Men's Snap Shoulder Undervest is a true staple for many people. Made of 100% cotton, this undervest has great breathability and allows for optimal comfort. This item is meant to be warn under a top or sweater to allow for extra coverage. Based off of customer feedback we recommend having 3 at all times; One to wear, the other in your closet and the remaining one in the washer. This item is adaptive by being completely opened backed when you undo the snap closures found on either shoulder.