Our navy blue sunglasses feature a robust circular frame with dark grey tinted lenses. BOSTON 4-S is an acetate-based frame inspired from the vintage era - a modernist blast from the past. The navy blue round sunglasses with dark grey tints strictly speak business. The elegance of these frames lies in its finer details. From the subtle “key-hole” nose-bridge to “hockey-end” temple tips and navy blue texture, they come together to build a strong silhouette.