Sandals for men are ideally made of leather, rubber, suede, and you can wear them with various casual outfits. Hawaianas is one of the most popular footwear brands in the world. Their products come in all shapes and sizes for all age groups and genders. They are a brand of flip-flops and was established in 1960. Shades of gray include cool gray, warm gray, dark, light, slate gray, and blue-gray.