TT Dynamic Gilet windproof, waterproof and breathable The wind, it's the cyclist's greatest foe! Whether it's the wind, rain or the changing seasons, a practical and stylish cycling gilet is the ultimate accessory for riders looking to adapt to changing weather conditions. TT Dynamic Gilet is a cycling vest designed with the needs of real cyclists in mind. Its three-dimensional slim fit design effectively reduces wind resistance and the elegant curved lines from the chest to the waist give you a more handsome look!