RaceQuip 356 Series 2 Layer Nomex Outseam Race Gloves - Black/Black - 2X-Large - 356907>> CLICK HERE FOR SIZING CHART << The RaceQuip 356 Series double layer outseam gloves are constructed with two layers of knit Nomex and exceeds the SFI 3. 3 5 rating. The outseam, or reverse seam as they are sometimes called, have the seam on the outside for improved comfort and better feel on the wheel. These are the same style of glove that you typically see worn in the top levels like NASCAR, Indy Car, IMSA and others. The palms are a high grip,