A classic Prym snap. Sew-on snap buttons with no tools (handy press) required. It is easy to sewn by hand and is very light and thin! Light and thin, so it can be used with thin fabric. Moreover, it is made of plastic, so it is safe for babies and metal allergies. Great for small items, clothes, baby clothes. You dont have to worry about rust, so you can wash it frequently or wash it again. Can also be used for outdoor equipment, rain wear, etc.