Calvin Klein Men’s Underwear Modern Structure Micro Green Boxer Brief NB2975-460 Brand New with Box. 100% Authentic. A streamlined silhouette, crafted with 4-way microfiber stretch for maximum flexibility and sustainable, recycled polyester. This Calvin Klein Modern Structure boxer brief is updated with a matte and high shine logo waistband and a supportive contoured pouch. - Recycled, eco-friendly polyester blended with stretch for a smooth fit - 4-way stretch for maximum flex that moves with you - Flexible stretch Calvin Klein Underwear logo waistband with matte + shine detailing - Supportive pouch with contoured seams for a sleek fit - Machine wash - 90% recycled polyester 10% elastane - Imported