Light Support Strappy Sports Bra
This Light Support Strappy Sports Bra ($16, originally $20) is great for low-impact activities, or if you don't need a ton of support. I've worn it for indoor bootcamp, Pilates, and on the bike. It comes with removable padding, and makes me feel firmly supported. I've done a TON of jumping in it and love how it moves with me.
Image Source: oldnavy.gap.com