Jump and run - without getting too hot! Sleeveless t-shirt for children made of elastic, quick-drying and moisture-wicking jersey. This easy-care sweater is perfect for sports and gym lessons! ¤¤The material has been given Reima's Xylitol Cool surface treatment, which gives a cooling feeling to the skin. The temperature of the surface of the skin actually drops one to three degrees. The cooling effect comes from xylitol and erythritol which are edible sweeteners, so the treatment is completely safe.¤