Sandals for men are ideally made of leather, rubber, suede, and you can wear them with various casual outfits. Hawaianas is a brand of flip-flops and sandals which is of Brazilian origin. These sandals were invented and patented in the 1960s. Their products cme in all shapes and sizes. Olive is having varieties like dark, light, brownish, greenish, and more. It is the most common color in camouflage.