Sixs Light BT STXL R V2, functional suit unisex

The BT STXL R V2 is a one-piece base layer designed to deliver maximum performance when worn under leather suits and technical protective gear.

It is part of the LIGHT BT V2 line: the lightest and most breathable platform SIXS has ever developed. Designed for extreme heat, high humidity, and heavy sweating. The structure is designed to actively dissipate excess body heat.

The V2 version incorporates a new, reinforced yarn specifically developed to improve durability and long-term resilience in high-stress areas.

While riding, this means:

• A constantly dry feeling against the skin
• Less friction under the suit
• More comfort on long rides
• Stability under protectors

The BT STXL R V2 is the most advanced summer technical undersuit for motorcycling within the LIGHT BT V2 line.

Features

• Full-body undersuit, designed for intensive use while motorcycling
• Improves heat and sweat dissipation in extreme heat
• New reinforced yarn in critical, high-friction areas
• Multi-zone construction for targeted ventilation and high durability
• 40% lighter than the 4-Season line
• 100% Made in Italy

Active Thermal Management

The LIGHT BT V2 fabric is designed for extreme heat and heavy sweating. The breathable structure aids in the dissipation of body heat and the transport of moisture to the outside.

Multi-zone construction

The multi-zone construction combines more compact, durable areas with zones of high ventilation. The anatomical cut improves the fit during use.

Stronger yarn

The V2 version uses a more durable yarn in high-stress areas, thereby improving durability and stability under motorcycle gear.

LIGHT BT V2 Construction

It is recommended that the LIGHT BT V2 fabric be used in high-stress areas, as it improves durability and stability under motorcycle gear.

The multi-zone construction combines more compact, durable areas with high-ventilation zones, positioning breathability and stability exactly where they’re needed.

40% lighter than the 4-Season line and the lightest and most breathable platform SIXS has ever developed.

When to wear it

This undersuit is designed for:

• Racing and sporty riding
• Summer touring
• Long rides in high temperatures

The close-fitting design prevents wrinkles and fabric bunching under the suit. This reduces pressure points and improves stability while riding.

Multi-zone structure

The structure combines different functional areas:

Compact, firm knit zones

Positioned in areas of friction against the suit to increase durability.

Mesh zones

Placed in areas of high perspiration to promote heat dissipation and accelerate evaporation.

Elastic support structures

Ensure stability, an anatomical fit, and seamless continuity under protectors.

The new reinforced yarn increases durability in high-stress areas without compromising lightness and breathability.

More durable, more stable

Compared to the previous version:

• More durable yarn in particularly high-stress areas
• Optimized anatomical fit
• More precise placement of friction zones
• Redesigned elastic waistband: higher in the front and lower in the back to follow the riding position
• Improved structural stability over a long service life

The new waistband construction was specifically designed to adapt to the motorcycle riding position. It provides stability without applying pressure to the abdomen, while ensuring optimal coverage in the lower back area.

Breathability remains the core DNA of the LIGHT BT V2 line: The garment actively supports moisture transport to the outside, reduces the feeling of dampness, and prevents sudden cooling during stops.