Boys' Space 7 Pack Cotton Boxer Briefs.  Prepare him for a little out-of-this-world comfort and ease with the Boys' 7 Pack Space Boxer Briefs. Made from breathable fabric for cool all-day wear, the elastic waistband ensures a secure fit. These Boys' 7 Pack Space Boxer Briefs make your little astronaut's everyday adventures even more epic. Boys' Sizes. Sits Perfectly at the Hips and Offers Full Coverage. Durable Fabric Construction that Withstands Wash After Wash.