adidas Kids - Performance Long Boxer Briefs Underwear 4-Pack (Big Kids). Color Collegiate Royal Blue/Grey/Collegiate Navy. On sale for $17.97. MSRP $26.00.. Brand Nameadidas KidsProduct NamePerformance Long Boxer Briefs Underwear 4-Pack (Big Kids)ColorCollegiate Royal Blue/Grey/Collegiate NavyPrice$17.97MSRP: $26.00Rating