Base Layer Top X-Small SFI3.3 & FIA Petrol Blue

The WALERO Base Layer Top X-Small SFI3.3 & FIA Petrol Blue is a professional-grade fire-retardant underwear system engineered for motorsport competitors, racing crews, and tactical operators who demand certified thermal protection. Designed for drivers competing in sanctioned racing events, this long-sleeve crewneck base layer meets both SFI 3.3 and FIA safety standards—mandatory certifications for drivers operating in high-heat environments where fuel fires and engine compartment exposure pose real thermal hazards. The petrol blue colorway offers visibility and professional appearance while maintaining full compliance with international motorsport safety regulations.

This base layer utilizes a fire-retardant blend fabric engineered to self-extinguish and resist ignition, creating a critical thermal barrier between skin and external heat sources. The long-sleeve construction with fitted crewneck design ensures full upper-body coverage without loose fabric that could catch flame or trap heat. At 0.65 lbs and dimensioned for a true X-Small fit, the garment provides minimal bulk under racing suits or tactical gear while maintaining the structural integrity required for repeated high-temperature exposure. The fabric composition balances breathability with flame resistance, preventing moisture accumulation that could compromise thermal performance during extended wear in competition or training environments.

Drivers competing in FIA-sanctioned Formula racing, sports car championships, and endurance events rely on this certified base layer as foundational safety equipment—worn directly against skin beneath racing suits to provide the first line of defense against thermal injury. Tactical teams and emergency personnel benefit from the same SFI 3.3 certification for vehicle operations and controlled-burn training. The X-Small sizing ensures proper fit for smaller-frame athletes and competitors, eliminating excess material that could create hot spots or reduce mobility. This single garment meets dual international safety certifications, making it the standard choice for any motorsport venue or high-risk thermal environment where regulatory compliance and protective performance are non-negotiable.