The Navy A-2, the successor of the N-1, first appeared in 1962, canceling the N-1's fur collar, changing the original fabric lapel, adding a pocket to the chest, and changing the inner wool to chemical cilia. In the era of chemical products, the textiles have grown by leaps and bounds. Compared with the more durable and cheap new chemical fiber materials, wool is a military product, and of course it is more advantageous to use chemical fiber materials. The surface fabrics used in the early 62 and 63 versions are all the same as N-1. Jungle Cloth, olive green.