Gunjin

I don't know if this has been asked before, but I was wondering what would be some of the advantages or disadvantages of training with straight focus mitts over curved focus mitts?

I'm interested in purchasing a pair for mainly training punches. I already have thai pads for kicking, punch/kick combos.

For those of you that use focus mitts which do use/perfer?

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"When a man is sufficently motivated, discipline will take care of itself." -Einstein