Machine washable is great. They are neutral color that will go with anything. Plus they give good toe protection. Ive been wearing these for over 20 years, and this latest version is the most comfortable Ive ever owned. The replacement is more on par. I LOVE the diamond pen! That will save a lot of money. I would recommend to anyone who enjoys a good book, but it does have an adult theme, so be aware of that. Not being familiar with thermal paste, I did not even realize the need to replace it until my CPU was regularly over 65C and sometimes reaching 84C. For the price, you cant beat this product.