"In addition, iray 2020 also features a native hair BSDF implementation, matching the recent MDL release!"
Blender already has it as well! Original link https://blog.irayrender.com/post/190895183971/feature-time-part-ii-iray-2020-introduces-native "part II: iray 2020 introduces native fiber intersection support! This delivers perfectly smooth hair, fur, carpet, and similar curve-based primitives out-of-the-box, without paying for extra memory and/or additional pre-computation time for tessellation to triangle-data!"