- Comfort: While we'd like to think all Title Nine sports bras are next-level comfortable, wireless sports bras are guaranteed to skip the poking, digging, and discomfort of some underwire bras. - Flexibility: If you're running, jumping, twisting, and turning, wireless sports bras give you the highest level of flexibility. - Style: Whether you're throwing on a workout tank over your sports bra or just a pair of shorts or leggings, wirefree sports bras tend to have styles and fabrics that are built to show off--additional shirt optional.