A beach perm is a natural-looking perm with soft, easily styled waves rather than tight curls. The term comes from the relaxed look of the hair after a day at the beach.
According to Hair Finder, the beach perm technique is most effective when used on layered hair styles with medium to thick hair density. The standard method is to use rods in three different sizes and wrap larger segments of hair on the rods in order to create wave patterns. Fashionista points out that modern perms, the beach perm or "body wave" included, are smooth and effortless and require almost no blow drying.