Authentic 13th Birthday Boxer Shorts Our funny Authentic 13th Birthday T-shirts and gifts are packed with great humor for that special person celebrating their 13th birthday. Product InformationNot too tight, not too loose. Fabric Thickness: Enjoy the roomy comfort of our sexy boxers as underwear or sleepwear. They're 100% cotton, open fly for thinking outside the boxers. Boxers, because you don't want to be brief.  |