adidas Kids - Performance Long Boxer Briefs Underwear 4-Pack (Big Kids). Color Onix Grey/Grey/Scarlet Red. On sale for $24.63. MSRP $26.00.. Brand Nameadidas KidsProduct NamePerformance Long Boxer Briefs Underwear 4-Pack (Big Kids)ColorOnix Grey/Grey/Scarlet RedPrice$24.63MSRP: $26.00