Great for everyday of the week, the mens underwear sale from Gap is a must-see. From bright blues to tangy oranges, you'll find exactly what matches your style and personality. Get a pair of socks to wear around the house on a lazy Sunday with the men's underwear sale. The mens underwear on sale offers products that are versatile making them great to pair with any ensemble. The classic black socks are great for dressy slacks and suits. With the mens underwear sale from Gap, comfort never goes out of style.