a car key, house key, or hotel key card while in the water. Boardshorts traditionally have no lining, unlike traditional swim shorts. Boardshorts are normally longer than many shorts or form-fitting speedo styles of swimwear, and often (other than the waist) they have a loose or baggy appearance. The major reason for the extra length is to protect the wearer's legs from wax on the board. Surfboards are covered with a layer of sticky wax, which allows the surfer to stand on the board without slipping off. However, this wax can rip leg hair off a surfer when sitting on the board waiting for waves. Long boardshorts cover the back of the leg when sitting on the board, preventing the wax from ripping out the leg hair. The length of boardshorts is also affected by fashion trends; the length can range from mid-thigh (old school) to below the knee, covering the entire knee. In the 2000s, boardshorts were often worn low in the back, exposing the top of the buttocks. Many designs of boardshorts use vibrant color, striking patterns including Hawaiian floral images, and highlighted stitching; however not all boardshorts have these features. Although the basic design for boardshorts remains largely the same, some manufacturers have taken advantage of new technology. Because surfers and other water-sports enthusiasts commonly wear boardshorts without underwear, one of the major complaints has been about the use of velcro for the fly closure which tends to entangle pubic hair. A solution that some manufactures have come up with is to use a neoprene fly, which does not allow the fly to completely open, but provides enough stretch so that the shorts can be easily pulled on and off. Pubic hair does not get caught on the neoprene fly. To remedy another common complaint, about boardshorts stitching in the inseam area which would rub directly against the wearer's skin, many manufacturers switched to a seamless design, or use welding or glue, rather than stitches. For boardshorts that have no liner, many males choose to wear some type of tight swimwear underneath. Some male wearers prefer to wear regular underwear such as compression shorts, boxer shorts, a jockstrap, or briefs under them, while others wear nothing underneath at all. Some female surfers wear a one-piece swimsuit or bikini bottom under boardshorts. Some style of Mixed Martial Arts shorts were developed from boardshorts. Men's physique class in the