SUGOi Apparel Size Chart Thermal protection in a pro fit long sleeve jersey. The RS Training Jersey offers an additional wind and water barrier combined with soft, breathable warmth. Firewall 180 panels in the front and shoulders provide weather resistance where you need it most, while MidZero thermal material is placed at the sides and back for better insulation. This jersey has a full length zipper and three stretch back pockets for storage. Features: - Firewall 180 on the shoulders, front chest and hem for wind and water protection - MidZero thermal fabric strategically placed on sides and back where heat escapes most rapidly - Three elastic back pockets expand easily to store your essentials