Hello For Paul (and the others of course), here are two images (with and without flash) of the sleeve liner which features one of my four pockets tunics. This is surely synthetic, isn't it ? I learned (on Wikipedia... don't know if it's a good source ) that this kind of fabric (polyamides, including nylon) has been invented by both an american and a german in the thirties and immediately used in textile industry and for parachutes. On Uniforms and Traditions of Luftwaffe volume 1, it is said that a 1935 order impresses the use of cotton for tunics sleeve liners, but the next orders seem not to be known. So I'm a bit confused. Any comments about these informations ? Thank you.