K1 Racegear K1R26-FUP-N-M Underpants Flex Black Medium

K1 Racegear K1R26-FUP-N-M Underpants Flex Black Medium is listed by Motorstate as a Fire Retardant Underwear Bottoms for catalog matching by brand, part number, and product name. Use this source-backed listing when comparing K1 Racegear components in the Fire Retardant Underwear Bottoms category. The manufacturer part reference is 26-FUP-N-M, while the Motorstate part number is K1R26-FUP-N-M. Catalog description context: Underwear Bottom - Flex - SFI 3.3/5 - Fire Retardant Blend - Black - Medium - Each. No vehicle compatibility is stated here unless it is present in separate fitment data.