First, the material that is used today is a mix of cotton and polyester. 100% wool was used at that time and is uncomfortable,hot,and thick. However they way it was sewn was all by hand and would have lasted forever. Today since what we wear is usually a mix as I said of cotton and polyester and is mass produced in factories from other countries. We do have 100% wool and cotton products but they refined so they aren't as thick,heavy,or uncomfortable as before. And if your wondering about the undergarments, they were the style of longjohns as are worn in winter and yes they were made of 100% wool. I hope this answered your question satisfactorily.