Great for hot days to help keep your dog’s coat cool all day long. Also great for use on dogs allergic to grass and after surgery to protect their sensitive areas. Sun shirts are comfortable, super soft, quick-drying, and offer 4-way stretch. No saggy shirts (like most dog shirts made from cotton)! Made from 80% Nylon/20% Spandex, our fabrics are rated UPF 50+, the highest sun protection provided by apparel and blocks 98% of harmful UVA and UVB rays. All PlayaPup sun protection styles are made from fabrics that are free of sunscreen chemicals too! No sunscreen needed, for covered areas, for sensitive pooches.