1570 NWT Old Navy Boxer Briefs Size Small 7 Pack Pack includes 7 pairs of boxer-brief underwear, each in a different color, print or pattern. Elasticized waistband with repeating logo. Fly front. Soft, breathable, lightweight jersey. Tag-free label inside back waist for added comfort. cotton 60%, polyester 40% S = 6-8 yrs. (23"-23 1/2" waist).