I usually juggle wearing socks, and while they are nice for standing on the floor,spinning and catching clubs on top of, but for regular club kick-ups, they have too little friction and the club sometimes slips.
I was thinking that some silicone-coated anti-slip socks with the silicone on top instead of under would be nicer for kick-ups, potentially without making changing socks for different tricks, if the silicone is placed right. I guess just twisting regular anti-slip socks could work for a proof of concept, but I don't have any around...
edit: I think knee-high socks with silicone (or whatever material is used on anti-slip socks) on the sides of the foot and up the leg would be my preferred style of kick-up sock.
Also maybe some kind of semi-transparent shirt could make this trick better (or using glowballs, like Iver suggests...) https://www.youtube.com/watch?v=VtA8uTXOsFI
What are some specialty clothing that you are missing for your juggling???