- Size: 17 • Cozy like slippers, these thermal sock-type slippers are as practical as socks. • The soft terry cloth interior keeps feet warm even in very cold weather. • The non-slip sole prevents accidental slips, a plus in terms of safety. • Highly elastic, this non-slip slipper sock makes it easier to put on and fits well to the shape of the foot. • With their animal prints, the cotton slipper socks bring joy to your child's outfits.