K1 Flex nomex base layer underpants black with white stich
K1 Flex nomex base layer underpants white

FLEX Nomex Underpants

$145.00
Color White
Size
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Introducing the Flex Nomex® Underpants, a groundbreaking innovation in racing underwear that redefines standards for comfort, protection, and performance. Precision-crafted from a premium blend of 50% Nomex and 50% cutting-edge viscose fibers, this revolutionary material composition delivers unparalleled flame resistance and exceptional protection against heat transfer.

Designed and rigorously tested by elite professionals in NASCAR, Rally Cross, and WEC, K1 Flex Tech Layers have swiftly become the preferred choice of racing underwear across all motorsport disciplines. Prioritizing safety, the Flex Underpants not only meet but exceed the stringent SFI 3.3/5 standards, ensuring your protection on the track.

The Flex Nomex Underpants are engineered for ultimate comfort, featuring an ultra-lightweight 180 g/m² material that keeps you cool, dry, and focused. This unique blend ensures superior weight savings and excellent thermal insulation to combat heat stress. Experience unparalleled comfort with minimal flat-stitched seams and a special non-chemical dry treatment that promotes cooling and combats odor.

  • Manufacturer Certified to SFI's 3.3 Standard
  • 50% Nomex® and 50% Innovative Viscose Fibers Ensure Superior Comfort and Flame Resistance
  • Minimal Flat-Stitched Seams for Reduced Friction Points
  • Special Dry Treatment to Promote Cooling and Combat Odor
  • Adds Valuable Additional Seconds of Heat Transfer and Direct Flame Protection

Material: 50% Nomex® and 50% Viscose

Machine wash on gentle cycle in mild-detergent on cold or warm cycle. Do not exceed 30 degrees (Celsius, 86 degrees Fahrenheit). Close all zippers, and secure all hook and loop closures (if applicable) and turn garment inside out to avoid damage while washing. Never use detergents containing bleach! Tumble dry on low heat for ten minutes then hang dry.

Flex Precision Pants Size Chart

IN
CM
Size Body Front Length (in) Body Front Length (cm) Elastic Waist (in) Elastic Waist (cm) Front Rise (in) Front Rise (cm) Back Rise (in) Back Rise (cm) Inseam Length (in) Inseam Length (cm) Bottom Cuff Width (in) Bottom Cuff Width (cm)
XS 39.50100.3 12.5031.8 11.5029.2 13.5034.3 30.0076.2 4.2510.8
S 40.50102.9 13.0033.0 12.0030.5 14.0035.6 30.5077.5 4.5011.4
M 41.50105.4 13.5034.3 12.5031.8 14.5036.8 31.0078.7 4.7512.1
L 42.50108.0 14.0035.6 13.0033.0 15.0038.1 31.5080.0 5.0012.7
XL 43.50110.5 14.5036.8 13.5034.3 15.5039.4 32.0081.3 5.2513.3
2XL 44.50113.0 15.0038.1 14.0035.6 16.0040.6 32.5082.6 5.5014.0
3XL 45.50115.6 15.5039.4 14.5036.8 16.5041.9 33.0083.8 5.7514.6
4XL 46.50118.1 16.0040.6 15.0038.1 17.0043.2 33.5085.1 6.0015.2
5XL 47.50120.7 16.5041.9 15.5039.4 17.5044.5 34.0086.4 6.2515.9

Our Guarantee ⟋⟋⟋⟋⟋⟋⟋

Built to Perform. Backed by K1.

We engineer our gear to meet the demands of the track. That is why our products come with an Industry-Leading Manufacturer’s Warranty. We guarantee that our materials and craftsmanship are free from defects, ensuring your gear is race-ready. If a manufacturing issue arises, we are committed to making it right by repairing or replacing your product.

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