When to use Litz wire in a half bridge

I am building a half bridge that will switch at a peak frequency of 100kHz. To mitigate the skin effect, one technique I've read about is using Litz wire to transmit the current.

However, I was wondering if only the load (switching node) needs to use Litz. Or does the drain of my high side FET/source of my low side FET also need Litz wire?