New. The U.S. Polo Assn. Men's 6 Pack Cotton Stretch String Bikinis in size 3XL are a classic and comfortable choice for men looking for underwear. Made of cotton with a stretch feature, these solid multicolor bikinis are machine washable for easy care. The pack includes 6 individual bikinis, perfect for everyday wear or as a gift for a loved one. With the iconic US Polo Assn. brand and a regular fit, these string bikinis are a stylish and practical addition to any man's underwear collection.