Men's sleep briefs Styx Are you looking for quality men's sleep briefs that are made in the Czech Republic? Then these sleeping briefs from the Czech brand Styx are the right choice.                   Men's sleeper briefs are made of comfortable material, they have a pleasant elastic waistband that does not cut anywhere. They have a small pocket on the back of the buttocks.               Learn more in the classic product information below. Size chart STYX - MEN SHORTS SIZE WAIST CIRCUMFERENCE (CM) S 80-90 M 90-100 L 100-110 XL 110-120