A no-see-um sock is a type of ankle sock that is designed to keep small and biting insects, commonly known as no-see-ums, away from the skin. While this term is widely used for this specific type of sock, there are several other synonyms that can be used interchangeably. For instance, they can also be referred to as insect repellent socks, bug-repelling socks, or mosquito bite-proof socks. Other terms that are often used include insect shield socks or bug barrier socks, highlighting their protective features. Regardless of the terminology used, these socks are ideal for outdoor enthusiasts who want to enjoy the outdoors without worrying about pesky insect bites.