Short-sleeved T-Shirt from Calvin Klein Jeans. A reliable T-Shirt is the foundation of every outfit, whether it's layered under a shirt or worn alone with jeans. Highlights. Pure regenerative cotton. Short sleeves Fit. Relaxed fit Material Composition. Main composition: regenerative cotton (100%) Sustainability Certification. RegenAgri Care instruction Machine Washable at 40°C Tumble dry gentle cycle Wash & dry inside out Article Code: IB0IB02335YAF.