How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 6 min read · Independent comparison
• LC-dolida 2 — biggest strength: two complete masks in one box, each with a 15mm 3D contoured eye cavity, six layers of light-blocking fabric and Bluetooth 5.4 audio.
• LC-dolida 2 — biggest trade-off: it runs on AAA batteries rather than a rechargeable cell, so you'll want to keep spares on hand, and it's the bulkier of the two to pack.
• ZHENYEMEI Sleep Mask — biggest strength: detachable dual 3D cups you can remove, swap and wash, plus a 1/2/3-hour sleep timer and USB-C charging that's rated for 10+ hours of playback.
• ZHENYEMEI Sleep Mask — biggest trade-off: it's a single mask, so there's no spare in the box, and the purple finish won't suit everyone's taste.
• Buy LC-dolida 2 if you want a two-person or backup-ready setup with a strong blackout story.
• Buy ZHENYEMEI Sleep Mask if you want a lighter single mask with more control over how you listen.
The LC-dolida 2 is built around one idea: remove every source of pressure from your face and every sliver of light from your vision. The 3D contoured eye cups carve out a 15mm cavity, and that depth matters. It means your eyes and eyelashes float rather than press against fabric, which is the difference between a mask you tolerate and one you forget you're wearing. Around that cavity sits ultra-soft memory foam and a six-layer light-blocking fabric with extended, flexible nose wings, the part most masks get wrong on side sleepers. If you sleep on your side and wake up with a light leak across the bridge of your nose, that's the design element to care about.
Who should buy it? Frequent travelers, office nappers, and anyone who wants a spare. The two-pack ships with a pouch and noise-canceling earplugs for each mask, which is genuinely useful if you fly with a partner or want one mask at home and one in a carry-on. Who should skip it? If you hate dealing with batteries, or if you want a mask you can wash the eye cups on independently, look at the other option. And if you want a single mask rather than two, there's no reason to pay for a pair.
ZHENYEMEI Sleep Mask: Who It's For
ZHENYEMEI's mask is the more modular of the two. The dual 3D contour cups detach, so you can remove, replace and wash them — one cup is a breathable advanced material, the other is bamboo cotton, and you choose based on the night. That's a small feature with a real payoff: masks get oily and sweaty, and being able to pull the cups out and rinse them beats hand-washing a whole electronic assembly. The nose section is shaped specifically to stop light creeping in, and the sunglasses-style silhouette is designed to sit well on all face shapes.
The control features are where it pulls ahead for some buyers. There's a timing function that shuts the audio off after 1, 2 or 3 hours, so you can fall asleep to a podcast without it playing until morning — and you can also leave it running all night if that's your preference. Charging is USB-C, roughly 1–2 hours to full, and ZHENYEMEI rates playback at 10+ hours, enough for a full night. Bluetooth 5.4 handles the connection with fast pairing and low power draw, and the range is stated at up to 45 feet, which is generous enough to leave your phone charging across the room.
It's also lighter. At 8.15 ounces packaged versus 10.55 ounces for the LC-dolida set, and in a smaller box, it's the easier one to toss in a bag. The memory foam and bamboo cotton combination is aimed at people dealing with insomnia, migraines or dry eyes, where breathability isn't a nice-to-have. Who should skip it? Anyone who wants a second mask as a backup, or who dislikes purple. And if you'd rather not think about charging at all, the battery approach on the LC-dolida might appeal more.
Side-by-Side: Which Should You Choose?
• Best for battery convenience → ZHENYEMEI Sleep Mask. USB-C, 1–2 hours to charge, 10+ hours of playback. LC-dolida 2 uses AAA batteries.
• Best for total blackout → LC-dolida 2. Six light-blocking layers plus extended flexible nose wings is the more aggressive light-sealing design.
• Best for hygiene and washing → ZHENYEMEI Sleep Mask. Its 3D cups come out and go back in; you can also swap between the two cup materials.
• Best for falling asleep to audio → ZHENYEMEI Sleep Mask, thanks to the 1/2/3-hour timer.
• Best for couples, spares or gifting → LC-dolida 2. Two full masks, two pouches, two sets of earplugs in one box.
• Best for travel weight → ZHENYEMEI Sleep Mask. Lighter package, smaller footprint.
• Best for material feel → LC-dolida 2 has the edge on paper with bamboo cotton plus a shiny outer shell and moisture-wicking claims; ZHENYEMEI counters with a bamboo cotton and breathable-material 2-in-1 cup system.
In my opinion, the ZHENYEMEI Sleep Mask is the one I'd buy for myself. The detachable washable cups, the sleep timer and USB-C charging are the three features I'd actually use every single night, and the lighter build makes it the better travel companion. I'd recommend the LC-dolida 2 instead if you sleep with a partner, want a backup mask, or rate absolute blackout above everything else — the two-pack and six-layer light blocking are hard to argue with. Match the mask to your habits, not the other way around, and check the current price on Amazon before you commit.
FAQ
Both are designed for side sleepers. LC-dolida 2 uses a 15mm 3D contoured cavity with memory foam for zero eye pressure. ZHENYEMEI uses two removable 3D cups that mold to your face and nose shape. LC-dolida focuses more on blackout; ZHENYEMEI focuses more on fit and washability.
ZHENYEMEI rates it at 10+ hours of playback after about 1–2 hours of USB-C charging, which covers a normal night. It also has a 1, 2 or 3-hour timer if you'd rather it switch off after you fall asleep.
LC-dolida 2 runs on AAA batteries, which are included. ZHENYEMEI uses a built-in rechargeable battery charged over USB-C. If you dislike buying or swapping batteries, ZHENYEMEI is the simpler routine.
The LC-dolida 2 works well as a gift because you get two complete masks, each with a pouch and earplugs — good for a couple or a frequent flyer. The ZHENYEMEI Sleep Mask is a single purple mask with a timer and USB-C charging, which suits someone who wants one well-featured mask rather than a pair.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Dr.meter Noise Cancelling Headphones vs SOARUN 5.4, JIAMQISHI USB Headset vs Nacon RIG 300, Sony WH-1000XM4 vs FiiO K9, Skullcandy Dime in-Ear vs EZ EAR KBEAR BT15: TWS Headphones