I hate those things. I don't understand why people insist on wearing them.
If you want to lift barefoot please just take off your shoes!
I don't like squatting sholess so I keep mine on, but my buddy likes to squat in his socks which is perfectly fine. But don't go out and spend money on something you can achieve as easily as taking off your shoes.
Also, I remember a couple years back the US army banned these things, and for good reason.