A watch strap, watch band, watch bracelet or watch belt is a bracelet that straps a wrist watch onto the wrist. Watch straps may be made of leather, plastic, polyurethane, silicone, rubber, FKM, cloth, or metal, sometimes in combination. It can be regarded as a fashion item, serving both a utilitarian and decorative function. Some metal watch straps may be metal plating with, or even in rare cases made of, .
Velcro watch straps (SEB 12100030 CF 55052-5 S/N 120) supplied by Omega Watch Co. and American Velcro Inc were first used for Project Mercury NASA space missions.
Metal watch straps are typically stainless steel. The most common metal watch strap styles are the folded link, pushpin, and screw-in styles. "Stainless Steel Bracelet Construction: The Folded Link, Push-Pin, and Screw-In Bracelet Systems".
A Bund strap are two leather watch straps with a separate piece of leather to sit on the wrist that serves the purpose of protecting the wearer's wrist from discomfort and pain caused by the extreme conditions in fighter and bomber aircraft cockpits. So, it acts as a protective layer between the skin and the metal watch.
Both metal watch cases and watch straps incorporating metal parts can sometimes cause contact dermatitis in susceptible individuals. Special anti-allergy watch straps, like a NATO style watch strap, which shield the skin from exposure to metal parts, are available for people with this type of dermatitis.
Specialist expanding watch straps exist for use with . The use of wet, or in some cases, dry suits require the strap to expand in order to accommodate the added material, which increases the circumference of the wrist. Many watch straps intended for diving watches have rippled or vented sections near the attachment points on the watch case to facilitate the required flexibility to strap the watch around the bare wrist or around wet or dry suits.
tie with matching NATO strap on Sector clock themed wrist watch.]] As the style gained popularity following its introduction in 1973, military personnel began to customize their watch straps, incorporating the colours of their regimental ties and/or , creating the colourful striped patterns NATO straps are known for.
The Zulu watch strap is a NATO watch strap adaptation using a thicker weave of fabric and more substantial metal hardware employing rounded loops and an oval-shaped buckle and both are typically made of nylon.
Perlon straps, Marine Nationale straps, Zulu straps, and NATO straps go completely around the wrist, including behind the case. Other wrist strap styles allow the back of the watch case to directly contact the skin.
== Watch strap types ==
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