There are many color options for the new Omega’s “NATO”straps made of polyamide, a textile made of synthetic fibers that offers good tensile strength, as well as resistance to abrasion.
“NATO” straps evolved from the leather and canvas ones used by British pilots, navigators and army personnel during World War Two.
For safety reasons, wristwatches did not use removable spring bars to secure their straps. Their fixed bars, often soldered, were less likely to break than spring bars so there was less chance of losing the strap. Of course, this meant that the straps were created in a single piece that slide through the fixed bars.