74% Polyester, 21% Lyocell, 5% Elastane Soft and stretchy fabric. Signature Calvin Klein elastic waistband. Tonal stitching detail. Micro blend with at least 20% sustainable Lyocell. Countered pouch, overlock seams and lpush embossed logo waistband for comfort and support. Start your day off great with the Calvin Klein Eco Classic Boxer Brief. This style you will love so much that it conveniently comes in a three-pack.