I bought these to replace a worn-out set I bought about 20 years ago! They are lightweight and warm and they travel with me around the world just in case i suddenly need a warm layer - also great to wear in bed if really desperate! Even though these silk thermal pants are the wrong size and colour (nothing else left in stock!) I'm still happy to have them - I will probably dye them black anyway! I would have bought the top too... if available!