OUR 365-DAY COMFORT GUARANTEE365 days. That’s how long you have to decide if UnderFit is your most comfortable undershirt. If it ever lets you down — collar, seams, or comfort — we’ll make it right.SIZE & FIT Tailored fit to give you a slimmer profile. Order the size you’d normally wear in a t-shirt. Unsure of what size you are? Or, are you in-between sizes? We recommend that you choose a smaller size as our undershirts have a great ability to stretch.MATERIALS & CARE For the ultimate care of your UnderFit undershirt, please follow the care instructions below. These instructions can also be found on the itch-free neck label undershirt. 57% Modal / 38% Lyocell / 5% Lycra (Spandex) Machine wash cold Hang Dry Low heat tumble dry if desired We also recommend that our undershirts are turned inside out for every wash. TOP 5 BENEFITS Incredible comfort: Our fabric blend is twice as soft as cotton, making you feel like you’re wrapped in a cloud of coziness all day long. Built to last: With high tensile strength, TENCEL™ ensures that your undershirt retains its shape and stays resistant to tears, even after countless wears and washes. Stay cool and fresh: The fabric in our undershirts provides fantastic breathability and temperature regulation, so you’ll feel like you’re wearing built-in air conditioning during those hot summer days. No more sweat stains and odors: Say goodbye to embarrassing sweat marks and unpleasant odors, as our moisture-wicking TENCEL™ fabric keeps you dry and smelling fresh throughout the day. The perfect fit and style: Our undershirts boast a slim-fitting design, tailored cut, and added length to stay tucked in, providing a comfortable and stylish fit that’s ideal for layering and enhancing your overall look.