From Handknit Holidays:

When the wrapping paper is put away and the last guests are gone, slip on this luxurious eye mask for some well deserved post-holiday crashing.  It’s filled with lavender, which imparts relaxing aromatherapeutic qualities, and flax seed, which retains temperature well, so the mask can be popped into the microwave or refrigerated for a warm or cool treat.  The smooth La Luz yarn feels wonderful on tired eyes--but it might feel even better sliding through your fingers as you knit it.  The mask is also very easy to knit, offering a last-minute gift option that won’t give you a headache.  You can easily make two or three masks from one skein of La Luz.