This is a watch strap made from old French military parachute straps. It is a used, authentic item. NATO straps from the British military are famous as military watch straps, but this elastic type is also comfortable to wear. It has stenciling on the inside, which I think is quite cool. Also, it usually has a yellow line, but the red line is quite rare. The width is about 20mm and the length is about 16cm, so it's suitable for those with slightly smaller wrists. It's rare for the real thing to be sold, so please take this opportunity if you like it.