I am a silk super-fan - but I only discovered the benefits of a silk eye mask a few months ago. I recently purchased a silk mask from 4 different online silk retailers and THIS mask is superior to every other mask. It is significantly bigger - which makes a massive difference and the quality of silk is better. The combination of the size and silk quality means it blocks out more light than its competitors (who all use a thinner silk).
To top it all - it is absolutely gorgeous.