Anne,
When I ordered I made sure to pay close attention to those labeled High Impact (there is a black box on the corner of each thumbnail pic that eithere says Med or High). Also, I went with the new "coconut" fiber material and this is supposed to be great for keeping away the accumulation of smell that many tech fabrics can acquire and has natural sunblock built in. The designs for these also appeared to offer more coverage and the descriptions hinted at great support, but I can't say for sure.
HTH,
Mattea