RST Tech X Coolmax Men's Short Sleeve Baselayer Top | 100294

Engineered from the ground up for riders who demand more from their first layer, the RST Tech X Coolmax Men's Short Sleeve Top brings a refined approach to moisture management beneath your riding gear. Built on CP-U Fabric with a Coolmax Finish, this baselayer has been developed specifically to pull sweat away from the skin and help maintain a stable, comfortable body temperature across a full day in the saddle.

Key Features

• CP-U Fabric construction engineered for rapid moisture transport, keeping you drier across long rides and warm-weather touring
• Coolmax Finish actively supports climate regulation, reducing the clammy, overheated feeling that builds under leathers or a textile jacket
• Short sleeve cut minimises bulk under tight-fitting riding gear while maximising airflow at the shoulder and upper arm
• Sits directly against the skin as a true first layer, improving the fit and feel of every outer garment placed over it
• Lightweight and versatile — equally at home on summer commutes, track days and multi-day touring runs
• Designed without protective rating so it complements any CE-rated jacket or suit without compromising compliance

Heritage, Design and Finish

RST has been producing performance motorcycle apparel since 1988, and the Tech X range represents the brand's focused approach to functional base layers — pieces that work without fuss, season after season. The Coolmax Finish is not simply a marketing label; it reflects a fabric treatment developed to enhance the wicking behaviour of the underlying CP-U Fabric, ensuring the garment continues to perform consistently even as temperature and exertion levels rise during a ride.

The design philosophy is deliberately restrained. There are no superfluous panels or gimmicks — just a clean short sleeve silhouette that lies flat under a leather suit or touring jacket without bunching at the cuffs or riding up across the torso. That attention to wearability under gear is the hallmark of a baselayer designed by people who understand motorcycling rather than simply applying sportswear principles to a riding context.

Performance on the Road and Track

Moisture management matters most when it is warm, when the pace is high, or when you are wearing a fully enclosed leather combination that traps heat efficiently. In each of those scenarios, a quality baselayer becomes the difference between arriving alert and arriving uncomfortable. The RST Tech X Short Sleeve Top addresses that directly: CP-U Fabric draws perspiration away from the skin so it can evaporate rather than saturate the garment, reducing the chilling effect that follows when a damp layer cools rapidly.

The short sleeve format makes this top the natural choice for summer riding, warm-climate touring and any situation where a long-sleeve layer would add unnecessary insulation. It also works well as a transitional-season piece worn beneath a mid-layer, giving the system flexibility without the extra weight of a dedicated thermal base.

Ideal Riding Scenarios

• Summer and warm-weather road riding
• Long-distance touring at higher temperatures
• Spirited road and track sessions under leathers
• Daily commuting in a jacket or suit
• Riders who prefer minimal material under their outer gear

Fitment and Compatibility

The RST Tech X Coolmax Men's Short Sleeve Top is designed to be worn as a direct skin-contact base layer beneath any motorcycle jacket, leather suit or textile riding jacket. It carries no protective rating and is intended purely as a comfort and moisture-management layer. Available in sizes S/M, M/L and L/XXL to cover the full range of riding builds.

Specifications

• Brand: RST
• Model: Tech X Coolmax Mens Short Sleeve Top
• Part number: 100294
• Type: Short sleeve baselayer top
• Gender: Men's
• Sleeve length: Short sleeve
• Fabric: CP-U Fabric
• Finish: Coolmax Finish
• Protective rating: Not a protective garment
• Purpose: Designed for moisture management and temperature comfort during motorcycling