Retro, Comfy and Cool. Our iconic Kawaii Cloud embroidered in white on Black and White Cotton Interlock Running Shorts. Whistle & Flute clothes are designed to be Playful, Unisex and Cool. We want your kids to be comfortable at all times so we use the softest fabrics and all safest inks. We focus on quality so they can be worn for years to come. Fabric & Care 100% Organic Cotton We know the last thing you want to do as parents is to have kids clothes you need to fuss about. We suggest throwing it in with everything else on cold and tumble dry low.