David C.wrote a review of Sierra Designs Down Bootie Slipper - Men's on April 6, 2009
This is a very nice bootie, BUT beware of the sizing. The site says that they run small and that is the understatement of the year. I have a mens size 10 foot and ordered the 10-11 and could barely slide them on, so I have re-ordered for the 11.5-13 size. My girlfriend has a womens size 9 foot and the 10-11 mens were snug on her.