Nike 4318 Eyeglasses combine a flexible memory-metal frame with a semi-rimless rectangle design. Built for everyday prescription wear, they prioritize comfort and durability for active use. Key attributes: Black | Flexon | Flexible memory metal frame | Durable construction | Prescription-ready | Nylor (semi-rimless) lens mounting | Semi-rimless frame | Rectangle shape | Dimensions & fit: Size 54 — Lens width 54 mm, Bridge 16 mm, Temple 145 mm | Size 56 — Lens width 56 mm, Bridge 16 mm, Temple 145 mm | Vertical lens measurement: 36.1 mm (size 54) | 37.4 mm (size 56) | Frame width: 124 mm (size 54) | 128 mm (size 56) | Composition & care: Flexon | Nylon | Clean lenses with lens cleaner and a microfiber cloth; store in the provided case when not in use.