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K1 RaceGear FLEX Underpants

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K1 RaceGear FLEX underpants are constructed of the highest quality blend of Nomex and natural viscose fibers. This innovative material construction offers not only

K1 RaceGear FLEX underpants are constructed of the highest quality blend of 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 to be worn beneath a driving/race suit. 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 throughout all forms of competition motorsports. Key features: * 50 percent Nomex, 50 percent innovative viscose fibers for ultimate in weight savings, flame resistance and 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 a range of sizes * Available colors: black or white