Bontrager B1 Short Sleeve Baselayer

The Bontrager B1 Short Sleeve Baselayer is an ultralight, cooling first layer designed to keep you comfortable during warm-weather rides. Made with Bontrager’s lightest baselayer fabric, this B1 construction uses Profila Cool material enhanced with 37.5 technology to regulate your body’s humidity and maintain an ideal core temperature. This helps improve on-bike performance even during high heat and sustained efforts. Its streamlined fit, tuckable length, and drop tail allow it to layer cleanly and comfortably under any cycling jersey.

Key Features:

• Profila Cool fabric powered by 37.5 active particle technology
• Ultralight design ideal for hot-weather riding
• Tuckable length and drop tail for a precise cycling fit
• Fitted cut for a streamlined, performance-oriented silhouette

Ideal For: Hot weather cycling, endurance rides, indoor training, performance-focused riders seeking cooling baselayer comfort under any jersey.