Ergonomic Design: No-pinch elastic waistband and U crotch makes you feel comfortable and free Cozy and skin-friendly: Made of stretchy cotton material that feels soft, breathable and keeps sweat away from skin Good Quality: Smooth seam and non-chafing stitching prevents chafing Exquisite Workmanship: These boys underwear are washable, comfortable and will not be fade and deformed Free: 4-way stretch fabrication allows greater mobility in any direction