Oh so very soft Blue Hoodie!Your doggy will enjoy the very soft, smooth feel and be comfortable in it! These are perfect for Chihuahuas! I have put them on the little doggys myself at Kobey's Swapmeet and immediately they stop shaking, warm or cold, it doesn't matter. I think it may be a security thing with them, kinda like Linus and his blanket?? Made out of High Quality Fleece, VERY VERY soft. Inside is 100% Cotton. Outside is 80% Cotton and 20% Polyester. Machine wash gentle in cold water. Available sizes and size chart below (inches). The XXS will fit a newborn dog about 3-6 weeks old.