KnuttSak boxer brief. 100% Premium Knit Cotton. Reinforced Knutt-Comfort® Groin Panel. No-Fly Flat Front. Conforms to Your Unique Body Shape. Exceptional Wear Durability. Embroidered "KnuttSak" Waistband. High quality, great fit, and long-lasting. The look is trim, athletic and very cool. Fit as good at the end of the day as they do when you first pull them on. Extra-thick material in groin panel provides exceptional comfort and just-right support. "Saks" are perfect for working out and even better for struttin' around in your underwear.