High-elastic fabric: Nylon, zero-touch skin, non-slip gathering, good companion for cool summer, comfortable and easy to wear. No steel ring: soft, healthy and comfortable, soft touch, comfortable elastic, free and close without restraint. Detachable inner cup: The inner cup is light and breathable, gathers shockproof, supports naturally, gathers the chest shape, and does not feel oppressive. Mild material: soft and skin-friendly, no foreign body discomfort. Size: M. Suitable for many fitness places: sports health bra, have this one enough for gym, yoga, running, cycling.