The Knoxville v2 Suit suit has a three-layer construction with a strong fire-resistant cotton twill and Feltro padding for optimum levels of driver protection. This suit is also equipped with stretch panels on the crotch, waist and underarm for an enhanced fit, and a twill fire-resistant cotton outer shell and lining for maximum driver comfort. Other key design features include a 3/4 stretchable arm construction, pre-curved arms and legs, stretch panels on the crotch, waist and shoulders for driver comfort and an optimized fit, and a boot cut leg with inner knitted elasticated cuff for maximum protection.  Certified to the SFI 3-2 A/5 standards.