Excellent choice — #1 of 31 Silk ranks #1 of 31 fabrics for chafe resistance. It is one of the best fabrics for this. Ranked with a smooth-fibre bonus plus low weight and breathability. It is the top pick.
Silk measures 60/100 for breathability, 11% moisture regain, 30/100 warmth, at 90 gsm. Chafe resistance rewards a smooth, light surface: Silk has a smooth hand at 90 gsm.