ALL-DAY COMFORT: Our Boys Performance Boxer Briefs are designed with all-day comfort in mind, featuring lightweight, smooth fabric as well as a fitted, slimmer, more athletic fit. PREMIUM QUALITY: We use high-quality materials in all our kids clothing to ensure maximum comfort, longevity and lasting power. Each purchase comes with three pairs of boxer briefs. SIZE GUIDE: Available in standard sizes Small to X-Large. UNDER ARMOUR: Under Armour is built on performance. Our vision is to inspire you with performance solutions you never knew you needed and can't imagine living without.