Sferoflex SF1578 Optical Frame pairs a butterfly-shaped acetate frame with a shiny Havana finish for a lightweight, everyday prescription-ready look. The design emphasizes comfort and a flattering silhouette for daily wear. Key attributes: Brown | Havana | Acetate | Lightweight | Durable frame | Demo lenses — replaceable | Compatible with prescription lenses | Available in multiple sizes (53, 55) | Butterfly-shaped frame | Full-rim acetate frame | Tortoiseshell (Havana) finish | Dimensions & fit: Size 53: Lens width 53 mm; Bridge 16 mm; Lens height 41 mm; Temple length 140 mm; Effective diameter 59 mm. | Size 55: Lens width 55 mm; Bridge 16 mm; Lens height 43 mm; Temple length 140 mm; Effective diameter 59 mm. | Composition & care: Acetate