The verdict
If you buy one sleep mask from this list, buy the Manta PRO Sleep Mask (91): its C-shaped cups, air-bubble seal and ventilated strap deliver the most complete blackout here, especially for side sleepers, and a 60-day guarantee covers the $85 bet. For the same modular idea at less than half the price, the original Manta Sleep Mask (88) is the value alternative, while silk shoppers should look at the Drowsy (85) and budget contoured shoppers at the MZOO (82).
Questions, answered
Can a sleep mask replace blackout curtains?
Not entirely, and it does not need to. A mask blocks light at the eye, so it works in rentals, hotels and shared rooms where curtains cannot be changed, and it travels in a pocket. Curtains darken the whole room and can help with heat and early sun in a way a mask cannot. For most light sleepers the mask is the cheaper, faster fix; the two together are the closest thing to total darkness.
Silk or contoured foam — which is better?
They solve different problems. Contoured foam masks (Manta, Nidra, MZOO, Bucky) hold fabric completely off the eyes, seal light out more reliably and protect lash extensions, at the cost of some bulk. Flat silk masks (Drowsy, Blissy, Alaska Bear) feel cooler and smoother on skin and hair and pack flat, but they rest on the eyelids and their seal depends more on strap tension. Choose contour for blackout, silk for skin feel.
How should I wash a sleep mask?
Follow the maker's care label, because the three families differ. The original Manta is machine washable; most silk masks here want a cool hand wash or a gentle cycle in a laundry bag; molded foam masks (Nidra, Bucky, MZOO) should be hand washed and air dried so the cups keep their shape. A weekly wash is a sensible rhythm for a mask worn nightly, and letting it dry fully between uses extends its life.
Which masks work best for side sleepers?
Look for thin or tapered sides and a strap that sits above the ears, so the pillow does not lever the mask off the face. The Manta PRO's C-shaped cups, the Nidra's thin side panels and the MZOO's curved sides are built for exactly this. Bulky flat foam and wide Velcro patches are the usual failure points, and a mask that seals on your back but leaks on your side is the wrong mask, however good its reviews.
Prices shown are for the mask as sold — one mask, including any strap or travel case the maker bundles with it. Prices are typical US street prices observed during research and change often — check the retailer for the current price. AmRank may earn a commission from links on this page; commissions never change a score. See the affiliate disclosure and methodology.