This strap is a substitute for Longines. It uses Hermès orange bottom leather. It is soft and has a beautiful shape. It is preferentially suitable for Longines watches. It is also suitable for watches with flat interfaces. Both flat interfaces and non-concave convex interfaces are acceptable. The use of JU crocodile skin far exceeds the standards of luxury goods groups in terms of waterproofness, sweat resistance, wear resistance and other performance indicators, which is 10 times the EU standard and 3 times that of the luxury goods group.