Spreadshirt Keep Calm Swim On Kids' Premium T-Shirt Do you love swimming? Show it off with this beloved "Keep Calm And Swim On" design. Perfect for wearing to practice or to gym class. Designed and printed in the USA. This comfortable and soft kids' t-shirt should be a big part of any kids' wardrobe. It wears rough and tough for kids who play the same way. Ideal for playing outside or sitting quietly doing homework, it is as versatile and durable as it gets. 100% cotton (except for heathered colors); Fabric weight: 5.29 oz (midweight). Double-stitched collar, sleeves, waist, shoulder and side seam. For best results and to maximize durability machine wash cold, inside out and tumble dry on low heat.