The Sparco RW-4 Youth Fire Resistant Racing Undershirt is a lightweight base layer designed specifically for young drivers competing in FIA-regulated motorsports. Constructed from soft, breathable Nomex® fabric, it provides excellent flame protection while remaining comfortable under a racing suit. The ergonomic fit and flat-seam construction reduce pressure points and improve comfort during long sessions in the car. FIA 8856-2018 approval ensures it meets modern safety standards for competitive racing.