purchased this.......love the way it fits BUT why is it bunching at the center cup seam?

not to be to personal, but, put on bra then lean over from your waist, reach inside bra and cup your hand under breast and pull it up into cup of bra,you may also wish to pull breast from side toward your body with both these things done it should not bunch up. be sure you kinda pull up breast in cup too.....

Anyone size F cup up have issues with support since this doesn't have underwire?? I've never worn underwire free.

YES!!! I am 42I or 40K and this is the most comfortable and insane it does give support with no wire needed! My only complaint…. The bands stretch out very quickly time wise owning and wearing a bra.. like major fast.. However stretched out not as tight as the bra was day one so not feeling that total held together in place brand new bra wonderland phase, it’s still amazingly comfortable and holds me together… I wish they would improve the quality of the materials of the bands though not tk stretch in literally 3 months… can even see the fabric at band little buckles of stretched out. But I have yet to find anything I can wear at all pretty much, so not the best lasting band or not… I’ll keep buying and wearing!

Does this bra really wick away moisture?

Not sure what wick away is, but I absolutely love this bra. It does keep me much dryer than other bras, is very comfortable and holds up very well to washings.

how can i get my right size for your product. my bust size is 42 and what cup ? it is sag too . i want to get the right measurement for my breast

Place the tape at the fullest part of your bust. Make sure it's parallel to your band again. Subtract the band size from your bust size to find the right cup size. Every inch equals one cup size up.