Back for the fifth generation, the Castelli Men's Prologo V Long-Sleeve Jersey is sure to become a staple in your cool-weather collection with its 2-layer Stratus+ fabric, which keeps you pleasantly dry and keeps chilly air from penetrating through to your core. The Prologo V's more relaxed cut provides greater range of motion than a tighter fitting, race-specific jersey. Mesh side and shoulder panels provide additional ventilation to prevent overheating on long climbs and fast-paced training rides alike. Additionally, you'll find a full-length YKK zip for smooth operation, three roomy rear pockets for storing additional layers and bottles, plus a secure-zip rear pocket that's perfect for tossing your keys and spare cash.