A sports visor — also called a sun visor or visor cap — is a type of crownless hat consisting simply of a visor

Visor

A visor is a surface that protects the eyes, such as shading them from the sun or other bright light or protecting them from objects....

 or brim with a strap encircling the head. The top of the head is not covered and the visor protects only the face, including eyes, nose, and cheeks, from the sun.

The visor portion of a sun visor may be either curved or flat and the strap is often equipped with an adjustable velcro

Velcro

Velcro is the brand name of the first commercially marketed fabric hook-and-loop fastener, invented in 1948 by the Swiss electrical engineer George de Mestral...

 fastener in back. The strap can function as a sweatband. This type of headgear was designed for use in outdoor sports (especially golf

Golf

Golf is a precision club and ball sport, in which competing players use many types of clubs to hit balls into a series of holes on a golf course using the fewest number of strokes....

, tennis

Tennis

Tennis is a sport usually played between two players or between two teams of two players each . Each player uses a racket that is strung to strike a hollow rubber ball covered with felt over a net into the opponent's court. Tennis is an Olympic sport and is played at all levels of society at all...

, and volleyball

Volleyball

Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules.The complete rules are extensive...

) where eye protection from direct sunlight is desirable, but is often used by non-athletes at beach and other sunny outdoor events.