GO-TO BRA FOR MEDIUM-IMPACT ACTIVITIES. The non-padded Nike Swoosh Sports Bra is made with compressive fabric to give you comfortable support during medium-impact workouts. Its mesh back panel lets air flow to help keep you cool. Medium support: compressive fabric offers support for medium-impact activities like gym workouts, spin, cross training and running. Breathable comfort: mesh back panel lets cool air in when your workout heats up. Dry design: Dri-FIT technology moves sweat from your skin to help you stay dry and comfortable.