Smitty 1/2 Zip Umpire Jacket - Men's Smitty's Half-Zip Umpire Jacket is made with a stand-up collar to block the wind and have you looking like a pro on the field. The ComfortTECH100 microfiber shell evaporates sweat to ensure you never miss a call. A nylon lining adds breathability on top of a banded waist. 100% nylon. Imported.