A slim fit athlete’s half zip the Terramar Mens Half Zip Thermolator Baselayer Top has plenty of four way stretch for freedom of movement and a midweight warmth for wearable comfort. Whether you’re a runner, or laying up over this, it’s a flexible baselayer with the added feature of a generous, truly half zip, front. No little 4” zipper here, this is mid-chest for full venting, so if your morning run starts off cold and ends when the day is warmer, you’ll have the venting you need to blow off a little extra steam. Slim fit cut, if you like your baselayers a bit looser, size up one for the fit you’re looking for. A fast wicking and drying layer that’s got all the features you’re looking for in an easy care synthetic treated with an anti-microbial to ward off any unfortunate odor issues. UPF rated to +25 you’ll even be comfortable wearing this for early and late season hikes when the sun is unexpectedly strong. Machine wash easy care with a suggestion that you line dry it to preserve the longevity of the fabric, if you’re looking for an all-around piece of performance sportswear you’ll be pleased with this half zip layer.