Features: Fabric type: 87% Polyester, 13% Spandex. Fleece-lined thermal fabric helps you stay warm on the outdoor runs. Thumb holes keep your sleeves in place and nice for keeping wrists warm. One side zip pocket for secure storage of your small items, such as keys and cards. Lightweight, 4-way stretch construction improves mobility for full range of motion. Crew neck and Reflective Elements are suitable for many cold outdoor activities, such as running, hiking, skiing and travel.