A nursing sports bra should incorporate several key features: 1. Adjustable Straps: To accommodate changes in breast size and ensure a snug fit. 2. Easy Access: Look for bras with clips or drop-down cups for quick and easy breastfeeding. 3. Moisture-Wicking Fabric: Keeps the skin dry and reduces the risk of mastitis. 4. Good Support: To minimize breast movement and prevent discomfort during exercise. 5. Soft and Breathable Material: Ensures comfort and reduces irritation.