Say goodbye to the days of boxy, sweat-absorbing, easily-untucked, single-purpose undershirts. All Citizens Aero Undershirts are weightless undershirts for men powered by our custom built performance fabric that’s light as air but heavy on performance: wrinkle-resistant, luxuriously soft, durable, anti-odor, breathable, sweat-wicking, quick-drying, stretchy and anti-chafing. It stays hidden under dress shirts, protects dress shirts from sweat stains, offers exceptional ventilation and runs longer in the back to stay tucked even after hours of movement. The form-fitting cut allows for seamless layering. High performance fabric + smart features = the perfect undershirt for travel, commute and beyond. Mix & Match any products sitewide to build your bundles. Buy 3, get 10% off your orderBuy 5, get 1 more* free (add all 6 to cart)Buy 7, get 2 more* free (add 9 to cart)Buy 10, get 4 more* free (add 14 to cart) *Free items will not be shipped separately if not added to cart*Lowest price item in cart will be discounted *First time customer? Check out our return policy here. *Sale items not included *Discounts automatically apply in cart All of our garments are easy care: wash on cold and hang to dry - that's itNo ironing necessary, but if desired, set the iron to very low heat and place a towel between the iron and the shirt. Do not let the fabric come into direct contact with the iron. Do not dry clean Do not bleachSo easy, you won't need to call mom for help. She'll be so proud. Fabric: Engineered with eco-conscious high-performance microfiber for a lower environmental footprint. Each undershirt diverts 6 plastic bottles from landfills, oceans and incinerators and reduces our reliance on fossil fuels. Fabric: 88% nylon, 12% spandex