Ensure your safety and comfort on the track with the K1 Race Gear Precision Nomex Long Sleeve Undershirt. In the realm of motorsports, safety and comfort are paramount, and this long sleeve undershirt is meticulously crafted from inherently fire-retardant materials, ensuring durable flame-resistant properties. Engineered with a focus on affordability, comfort, and enhanced protection, this undershirt is a must-have for any serious racer. Crafted from durable and soft-knit material, our Precision base layers guarantee optimum comfort during demanding hours on the track. The flat, interlock stitching reduces friction points, ensuring exceptional performance when worn under a driving suit. A standout feature is the minimal flat-stitched seams, reinforced with specialized flame-resistant thread, eliminating discomfort and pressure points, allowing you to concentrate on your performance without distractions. Prioritizing safety, this undershirt complies with the stringent SFI Foundation 3.3/5 specification. Crafted from Meta-Aramid material, it not only offers protection but also keeps you cool and comfortable with its moisture-wicking properties. For your convenience, the Precision Nomex Undershirt is available in both long and short sleeves. Please Note: Only the long sleeve Precision model is SFI 3.3/5 rated. The short sleeve version is manufactured with the same materials and to the same exacting standards; however, it is not SFI Rated. Prioritize your safety and comfort on the track with the K1 Race Gear Precision Nomex Long Sleeve Undershirt, ensuring certified protection without compromising on comfort. Precision Nomex Underpants are also available and sold separately.