The Santini? ones I had during RATN were really nice... until they weren't. They have couple of cm of elastic to grip so they stay in place really well but unfortunately after 3 days of swapping hand positions, the grippers dug into and screwed up my median tendon. I could probably stretch the elastic so they're not so tight but then they'll be flappy like all the others.
I guess ones with a thumb loop will open a whole other can of worms . Re-purposed calf sleeves? I know bridgedale make some but they might be way too tight along the whole length. Plus not long enough.
Decathlon do some armwarmers that look like it's just fabric to grip
The Santini? ones I had during RATN were really nice... until they weren't. They have couple of cm of elastic to grip so they stay in place really well but unfortunately after 3 days of swapping hand positions, the grippers dug into and screwed up my median tendon. I could probably stretch the elastic so they're not so tight but then they'll be flappy like all the others.