The sof-tec Primo polyester/spandex fabric that sports the elite dry-Excel™ technology. The 4-way stretch for maximum mobility, along with the peached feel of the fabric that makes it so very soft. It's the little details that really get us though, like the raglan sleeve that increases reach, and the 1/4 zip neckline that features reflective zipper tape for night safety. And we really love the bit of contrasting colors on the bottom hem and sleeve cuffs. It even has thumbholes on the sleeves for extra wiggle room.