The Simpson Superior Lightweight Technology or Simpson SLT combines over 60 years of racing innovation with NASA Aerospace advancements to deliver our most lightweight and breathable suit ever. The SLT comes standard with our new 3D Honeycomb UltraSoft Liner and new Comfort Fit cuffs. This outstanding performance of weight, breathability, and comfort has been achieved while exceeding the stringent SFI standard of 3.4/2A. Our newest and most advanced layup can be used in any of your favorite fits, including our most popular DNA. Feeling is believing, order your new favorite suit today.