Bests & Worsts Reviews from Amazon

These are great, but flawed and CAN BE FIXED. Sure, they keep the light out the best and allow you to move your eyes/eyelashes in complete darkness. The problem, as others have noted here, is that the flat, thin plastic is sharp edgewise and is so darn over sized (see the ad photo) as to prevent any sleeping on your side with the mask on. I have bought these glasses for about 10 years, due to their (laying on your back) effectiveness. Finally, it came to me three years ago, a two part fix: 1. cut the plastic around the edge with some scissors! You can take 1/4" off all along the glasses, especially around the nose cutout (except the very ends which have the slots for the band) and that makes all the difference in the world comfort wise, and has no effect at all on the opaqueness or light blocking ability of the item. Now, (#2) here's another, equally important modification, an even better trick. Get some good, black (or any color, really) gaffers (duct, "duck", whatever) tape and remove the Velcro mask band ends and then put several layers of wide tape on the outside of the large black plastic sheet that comprises the non-foam part of the MindFold system. Then cut two little slots in the tape where the slots are in the black plastic and "re-string" the head band, and, you're done. What have you done? Extended the life of these $12 sleep goggles about three or more years with 45 seconds' work. In my experience, the plastic cracks from fatigue starting about 12 months in. With the gaffers tape on, the mask's plastic and crack all it wants, in fact the sheet can break, mine did about two years ago, and they are even more comfortable and just as light tight, even better because they bend more easily to your facial contours, with the tape on the outside. Save money, have fun, keep the same sleep mask for years, and, make it much, much, much more comfortable! Are you listening, Mindfold?)