Needed to replace a lightweight silk thermal bottom which had worn out. I couldn't find a like product in silk, so decided to try these. Exactly what I wanted, light enough to wear under slacks to my chilly office every day, yet keeps me warm. Also better than silk in that I can machine wash & dry with no special treatment. Fit was perfect (size S) -- I usually wear size 6 or 8. Will look for this brand again next time I need this type of garment.