When you’re spending long hours on the bike, comfort depends on more than just your outer jersey. The first layer is the one that works constantly against the skin, managing heat, sweat, and comfort throughout every ride.
That’s why the BT SBL was developed with one specific goal: to provide a baselayer designed exclusively for cycling, built to perform in hot conditions and during the most demanding efforts.
Designed to follow the riding position
The BT SBL is the only product in the LIGHT BT V2 line developed with a primary focus on cycling.
Its construction is specifically designed to follow the cyclist’s natural riding position, adapting to body movements throughout every ride while ensuring a stable fit, even during long hours in the saddle.
A purpose-built design that allows the garment to work in perfect harmony with the cyclist’s movements.
Heat and sweat under control
During cycling, especially in the hottest months, the body generates significant heat and perspiration.
The BT SBL promotes heat dissipation and moisture management, helping maintain a consistently dry feeling even during prolonged rides.
Its technical construction also helps reduce sweat build-up beneath the cycling jersey, improving overall comfort and minimizing the heavy, damp feeling often experienced on hot days.
The lightness of the LIGHT BT V2 line
The BT SBL is part of the LIGHT BT V2 line, the lightest and most breathable baselayer ever developed by SIXS.
Compared to the 4-Season line, it is up to 40% lighter, offering maximum ventilation and comfort while maintaining stability throughout the ride.
The result is a constant feeling of lightness, even as pace, temperature, and intensity increase.
A baselayer born to ride
Every detail of the BT SBL has been developed around the real needs of cyclists: the riding position, long hours in the saddle, intense heat, and high perspiration.
It is designed to work beneath your cycling jersey, helping maintain a stable body microclimate and delivering consistent comfort kilometre after kilometre.
Because in cycling, the first layer is more than just a garment.
It’s the foundation of every comfortable ride.
