The close-fit thermal base layer The Women's Tecbase Fire Long Sleeve Tee keeps you warm on and off the bike. It's made from an ultrasoft, flexible material that provides all-day comfort. With a close-to-the-body fit, it's an ideal layering piece under motocross or mountain bike jerseys, but can be worn as a stand-alone shirt at the gym or on workout sessions. The 4-way stretch fabrication ensures you have a true range of motion during all athletic endeavors. Womens Tecbase Fire Long Sleeve Shirt