Base Layers & Socks

The NEW K1 FLEX Tech Layers are constructed of the highest quality blend of 100% Nomex and natural viscose fibers. This innovative material construction offers not only superior flame resistance and protection against heat transfer, but is the ultimate choice for soft, lightweight comfortable underwear. Designed and tested specifically by top pros in Rally Cross, WEC and other endurance challenge series, the K1 FLEX Tech Layers are quickly becoming the top choice of racing underwear throughout all forms of racing.

• 180 g/m² Super Lightweight Material 50% Nomex, 50% innovative viscose fibers for ultimate in weight savings, flame resistance & thermal insulation to combat heat stress and fatigue
• Exceeds both SFI 3.3/5 and FIA 8856 homologation standards
• Minimal flat stitched seams with specialized flame resistant thread for added comfort
• Special non-chemical dry treatment to promote cooling and combat odor
• Highest level of elasticity and softness Available in men's sizes Small - 2XL

The NEW K1 FLEX Tech Layers are constructed of the highest quality blend of 100% Nomex and natural viscose fibers. This innovative material construction offers not only superior flame resistance and protection against heat transfer, but is the ultimate choice for soft, lightweight comfortable underwear. Designed and tested specifically by top pros in Rally Cross, WEC and other endurance challenge series, the K1 FLEX Tech Layers are quickly becoming the top choice of racing underwear throughout all forms of racing.

• 180 g/m² Super Lightweight Material 50% Nomex, 50% innovative viscose fibers for ultimate in weight savings, flame resistance & thermal insulation to combat heat stress and fatigue
• Exceeds both SFI 3.3/5 and FIA 8856 homologation standards
• Minimal flat stitched seams with specialized flame resistant thread for added comfort
• Special non-chemical dry treatment to promote cooling and combat odor
• Highest level of elasticity and softness Available in men's sizes Small - 2XL

The CoolMax vented shirt is ideal for racers, as CoolMax clothing helps keep the body dry by wicking moisture away. If you race karts or racecars, you know firsthand how wearing a racing suit can result in perspiration on the racetrack. With a CoolMax shirt, you can stay dry, cool, and comfortable out on the track, meaning you can pay less attention to your discomfort, and more attention to your driving!

• Vented For Maximum Breathability
• Easy Machine Washable
• Moisture Wicking

The CoolMax vented shirt is ideal for racers, as CoolMax clothing helps keep the body dry by wicking moisture away. If you race karts or racecars, you know firsthand how wearing a racing suit can result in perspiration on the racetrack. With a CoolMax shirt, you can stay dry, cool, and comfortable out on the track, meaning you can pay less attention to your discomfort, and more attention to your driving!

• Vented For Maximum Breathability
• Easy Machine Washable
• Moisture Wicking

The K1 Precision line of Nomex Tech Layers combines the three most important features drivers look for in protective underwear. Cost, comfort and added protection. This durable, soft knit underwear is crafted with flat, interlock stitching for comfort and performs excellent under any driving suit with it’s moisture wicking properties.

• Complies with SFI Foundation 3.3 specification
• Meta-Aramid construction for cool comfort
• Minimal flat stitched seams with specialized flame resistant thread for added comfort

The K1 Precision line of Nomex Tech Layers combines the three most important features drivers look for in protective underwear. Cost, comfort and added protection. This durable, soft knit underwear is crafted with flat, interlock stitching for comfort and performs excellent under any driving suit with it’s moisture wicking properties.

• Complies with SFI Foundation 3.3 specification
• Meta-Aramid construction for cool comfort
• Minimal flat stitched seams with specialized flame resistant thread for added comfort

The K1 Precision line of Nomex Tech Layers combines the three most important features drivers look for in protective underwear. Cost, comfort and added protection. This durable, soft knit underwear is crafted with flat, interlock stitching for comfort and performs excellent under any driving suit with it’s moisture wicking properties.

• Complies with SFI Foundation 3.3 specification
• Meta-Aramid construction for cool comfort
• Minimal flat stitched seams with specialized flame resistant thread for added comfort
• Available in long and short sleeve (see note)
• Note: Short Sleeve Precision Nomex undershirts are NOT SFI Homologated

• Advanced tech base layer with Alpinestars innovative flame-resistant technology incorporating elastane fiber for improved engineered elasticity and high levels of comfort.
• Stretchable construction under the new homologation standard requirements.
• Soft-touch textile for feel and enhanced comfort.
• Certified to the new FIA 8856-2018 homologation standard.
• Lenzing FR® material is a natural viscose fiber with unique thermal insulation and flame resistance properties that help prevent heat stress.
• Flat seams construction to reduce pressure points and improve strength.
• Mouth opening for hydration tube access.

• Advanced tech base layer with Alpinestars innovative flame-resistant technology incorporating elastane fiber for improved engineered elasticity and high levels of comfort.
• Stretchable construction under the new homologation standard requirements.
• Soft-touch textile for feel and enhanced comfort.
• Certified to the new FIA 8856-2018 homologation standard.
• Lenzing FR® material is a natural viscose fiber with unique thermal insulation and flame resistance properties that help prevent heat stress.
• Flat seams construction to reduce pressure points and improve strength.
• Mouth opening for hydration tube access.