Calvin Klein Pro Stretch 3-pack cotton trunks feature signature elastic waistbands with bold 'Calvin Klein' branding in contrasting black lettering. Made from soft, breathable cotton stretch fabric for all-day comfort and flexibility. The classic trunk cut offers moderate coverage and a sleek silhouette, ideal for daily wear under fitted clothing. Each pack includes four essential colors: vibrant red, heather gray, crisp white, and deep black—ensuring versatile coordination. The iconic red waistband design is instantly recognizable and aligns with CK’s minimalist luxury aesthetic. Reinforced stitching and tagless construction enhance durability and skin-friendliness. Perfect for men seeking premium basics that combine performance, style, and reliability. Ideal for casual, office, or travel settings—designed for year-round wear in spring, summer, fall, and mild winter conditions.