I've been using these. https://www.foxcreekleather.com/leather-throttle-grips/

 

I had the rental Performance machine grips on my sportster. i loved em. Got an Fxdls and decided to go with Arlen Ness knurled because they were cheaper. Regret. Super uncomfortable without gloves. Got the PM rentals on the fxlds. Good quality

 

I had a set of Kuryakyn ISO grips and they did nothing to help. They looked & felt nice, but I still got numb hands on the highway on my XL1200C.