Availability
K1 RaceGear FLEX Underpants
Not Yet Reviewed
Key features:
* 50 percent Nomex, 50 percent innovative viscose fi
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
Showing In Stock Items. Show All 10 Items.
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, White, SFI 3.3/5, FIA 8856-2000, Men's Medium, Each
Part Number: KOR-26-FUP-W-M
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, Black, SFI 3.3/5, FIA 8856-2000, Men's 2X-Large, Each
Part Number: KOR-26-FUP-N-2XL
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, Black, SFI 3.3/5, FIA 8856-2000, Men's X-Large, Each
Part Number: KOR-26-FUP-N-XL
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, Black, SFI 3.3/5, FIA 8856-2000, Men's Large, Each
Part Number: KOR-26-FUP-N-L
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, Black, SFI 3.3/5, FIA 8856-2000, Men's Medium, Each
Part Number: KOR-26-FUP-N-M
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, White, SFI 3.3/5, FIA 8856-2000, Men's 2X-Large, Each
Part Number: KOR-26-FUP-W-2XL
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, White, SFI 3.3/5, FIA 8856-2000, Men's Small, Each
Part Number: KOR-26-FUP-W-S
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
Fire Retardant Underwear Pants, FLEX Underpants, Full Length, Nomex®, Black, SFI 3.3/5, FIA 8856-2000, Men's Small, Each
Part Number: KOR-26-FUP-N-S
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
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