VIO2® stands out for its whacky, unusual "H" shape tape and bright blue color. But does it work as a great mouth tape? We put it to the test to find out.
We don't recommend VIO2® tape.
.png)
We just couldn't fall in love with the shape and form factor of the tape. It's cool that you can wear it two different ways, but for us, VIO2® just felt consistently awkward to put on and remove. Frequently the pointy ends of "H" shape ended up sticking into our mouths. Most importantly, VIO2 brand failed to confirm if their adhesive is safe for the mouth. A red flag for us, sadly. We do not recommend VIO2® mouth tape.
Our 25-product comparison put VIO2® in 13th place. Largely because its unusual “H-shaped” strip proved fiddly: the pointy ends often poked the tester’s lips and made both application and removal awkward. While the tape earned marks for a firm overnight seal, freedom of jaw movement, and a wallet-friendly cost of about $0.56 per night, it stumbled on safety transparency. The company declined to verify that its adhesive is non-toxic or to disclose full material composition. An immediate red flag for a product that sits on your mouth for eight hours.
Pros:
Relatively strong hold strength
Low cost
Cons:
Incredibly awkward and fiddly user experience
VIO2® did not verify the contents or safety of their adhesive
Strong adhesive caused discomfort and sore lips upon removal
Often leave residue on the skin
Reliable stick and low price cannot outweigh unanswered questions about adhesive safety. Unless you’re willing to gamble on unknown materials for the sake of a very unusual shape, there are a few much better-vetted tapes that offer similar better without the worry or the fiddly user experience. For now, we do not recommend VIO2 Mouth Tape.
Seeking a great alternative? Check out our full review of 25 top mouth tape products.
Mouth taping shows genuine promise for certain sleep-related benefits, especially reducing snoring and mild obstructive sleep apnea (OSA), but evidence from large-scale clinical trial is still on the limited side. A few smaller clinical studies have been conducted, and many of their results do support core mouth taping claims. In short: Initial research supports mouth taping benefits (including, improving sleep, reducing snoring, reducing sleep apnea-related wake ups, etc.)
Rank
Overall score
Is it
safe?
7 Night challenge
Sleep Karma is our favorite mouth tape, based on 100% transparent research & testing. #1 of 25 products evaluated.
After thoroughly testing 23 different mouth tapes, Sleep Karma stands out in every way. First, the materials are best-in-class: most importantly, the adhesive is certified non-toxic, hypoallergenic, and skin-safe, meeting ISO-10993-1 biocompatibility standards. The fabric itself is ultra-premium bamboo silk — breathable, buttery-soft, and a dream to wear overnight. We also love the performance: the tape stays firmly in place all night, but peels off easily and gently in the morning (without leaving any yucky residue on your lips). The size and shape are another win — the full-coverage design keeps the mouth securely closed (and for beginners, they also offer "slim strips" which go vertically across the lips). Sleep Karma goes above and beyond by including monthly free gifts, such as a stunning bamboo night stand and bamboo travel case (with a subscription) and 24/7 access to a team of sleep coaches. All of this comes at a price that's right in line with most competitors — around $0.83 per night for dramatically better sleep.
• Certified skin-safe adhesive (meets ISO-10993-1 standards)
• Ultra-soft, breathable bamboo silk
• Secure hold and easy removal with no sticky residue
• Full-coverage design for complete mouth sealing
• Slim strip option available (perfect for beginners)
• Complimentary bamboo bedside stand and travel case (included with subscription)
• Free 24/7 access to expert sleep coaches
• Excellent value (~$0.80 per night)
• Mouth taping may take a night or two to get used to
• Only available online
