Blocks light VERY well!
Finally found a mask that actually works, after having the one I used to use being discontinued.  This mask covers very well, with only a few minor tweaks and adjustments being needed to keep light from creeping in by the bridge of your nose.  The eye domes could be a little bit bigger, but overall, it is pretty close to perfect.  Plus it comes in a fancy package, with ear plugs and a small box for the earplugs.  Fun!  We even bought a set as a Christmas gift, in addition to the three we secured, in case this one gets discontinued.
Rating: 4 stars