Multifunctional thermal active shirt
The US lvl 1 is a thermal active undershirt that is perfect as a first layer under a sweater or shirt, but also a great choice when your skin needs protection from the sun. The US lvl 1 underwear is made from Helikon-Tex® Quick Dry knit, making the shirt breathable and very effective at wicking moisture. The US lvl 1 undershirt will keep you comfortable even during long hikes or other intense physical activities.
