Rectangle Half Frame Sunglasses in 2 Colors. It’s all about the exposed rims on these mens half frame sunglasses with rectangular-shaped lenses. Semi-rimless sunglasses feature exposed flat-top lenses with sheer, thick frames hugging the bottom rims and integrated nose pads. Temples decorated with a skinny slanted gold accent on both sides. If you’re looking for retro-futuristic shades, these half frame sunglasses for men always look sleek and modern. Available in Brown Tortoise Shell (gradient brown lens) and Sheer Grey (gradient mirrored lens).