The PosiGrip Glove with two layers of Nomex on the back and one layer on the palm meets SFI 3-3/5 requirements. The PosiGrip is specially designed for positive wheel and shift feel in all conditions Meets SFI 3.3/5. Includes SFI tagStandard thumb set with two-layer leather and Nomex palm:Primary layer is high grade leather with waffle weave Nomex back (against palm)Secondary layer is an ergonomically designed and padded template with Posi-X double needle stitching covering the palm and thumbTwo layers of Nomex on glove back features 8 oz. layer exterior/waffle weave interiorOne layer of waffle weave Nomex on palmStandard padded leather knuckle guardAll Nomex standard gauntlet with elastic wrist for custom fitSpeedfit wrist adjusterHandcrafted for superior comfort and quality