This product was mentioned in 1 comments, with an average of 1.00 upvotes
I use colored bandage tape to keep the covers in place. It works well and I am quickly able to differentiate which controller goes to what hand.
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https://www.amazon.com/gp/product/B078P7Y5N8/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&th=1