The DNA SLT base layer system is built to disappear under a suit. Ultra-flat seams eliminate friction points, a breathable knit construction keeps drivers cool under fire, and the split-seam balaclava design reduces pressure at the forehead — a small detail that makes a big difference over a long stint. Dual-certified to SFI 3.3/5 and FIA 8856-2018, and available as a top, bottom, and headsock in a two-tone Black/Grey colorway.