If you do any kind of activity that makes your breast bounce up and down, you should consider wearing a sports bra. The medium-support seamless fitness bra is stretchy and allows for full movement while wearing it. There are no wires and clasps to dig into you, so they are comfortable and breathable. It's also great lounging, yoga or leisure and sleep bra too. Quick-drying performance fabric wicks away moisture to keep you cool and dry. If you want to wash it by Washing machine, please remove the pads before you wash the bras. The cross size means the 2 sizes are all fit for you, the smaller size fit well and a little snug but supportive. The larger size was recommended. Running This workout bra can wear when you are running, jogging, walking, or other exercise activities. Daily Wear Wireless clips free and wide straps, relieving pressure from shoulder and chest, Adjustable Straps Strappy Sports Bras Seamless Smooth Slip Shorts for Under Dresses High Waist Cincher Thigh.