Manta Sleep Mask

Most sleep masks are glorified blindfolds that press on your eyelids and let light leak in around your nose. Manta's design uses adjustable modular eye cups that create zero-pressure darkness — your eyes can open fully inside the cups without touching fabric. The cups are infinitely adjustable on the headband, so they fit any face shape without the strap pressure that causes headaches. Side sleepers can wear them without the mask shifting. True 100% blackout, zero eye pressure, no light leaks. The $35 price makes it the cheapest item on this list and arguably the highest ROI for anyone whose bedroom isn't perfectly dark.