If you want open-ear bone-conduction headphones that leave your ear canals free while you exercise or settle in for sleep, choose Syohoxi Ultra-Comfortable Open-Ear sport; if you need a lightweight open-ear design with dual-device pairing and extra listening time from its case, choose mifo FiiTii Z Open.
Syohoxi Ultra-Comfortable Open-Ear sport vs mifo FiiTii Z Open at a Glance
• Syohoxi Ultra-Comfortable Open-Ear sport: Bone-conduction audio and an open-ear fit leave the ear canals free; the trade-off is that its listed battery life is up to 8 hours without extra case playback.
• mifo FiiTii Z Open: Its 5.9 g design, dual-device connection, and case extending total battery life to up to 35 hours make it adaptable; the trade-off is that its listed water protection is IPX5 rather than Syohoxi’s IP56.
• Choose Syohoxi if you want bone conduction, a sport-focused fit, and a quick-charge option.
• Choose mifo if low weight, switching between two paired devices, or the charging case’s added playback time matters more.
Syohoxi is the more explicitly workout-oriented option. Its bone-conduction drivers deliver audio while its open-ear design leaves the ear canals free to pick up surrounding sounds. That can suit outdoor running or cycling, where hearing traffic and nearby activity matters, and indoor sessions where you want to remain aware of gym instructions. The listed connection is Bluetooth 5.3, with a range of 10 meters.
Its listed battery life is up to 8 hours, with a 2-hour charge time. A 5-minute charge is specified to provide up to 30 minutes of playback, which is useful if you realize shortly before a workout that the headphones need power. The IP56 rating and described resistance to sweat and rain also fit active use; they are not intended for swimming.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-18 · 6 min read · Independent comparison
For sleeping, the open-ear design may appeal to someone who wants audio without in-ear tips, but the available details do not establish that either product is comfortable for every sleep position. Syohoxi’s strongest case is still exercise and situational awareness, not a specialized bedtime design.
mifo FiiTii Z Open is the more flexible everyday-listening pick on paper. It weighs 5.9 g, uses a curved-hook open-ear design, and supports simultaneous connection to two devices. That combination is useful if you want to keep a phone and another device paired, then switch between music and notifications without repeatedly reconnecting. Bluetooth 5.4 is specified, with a range of 12 meters.
The earbuds provide up to 8 hours of playback on a charge. The case is described as extending total battery life to up to 35 hours; the product details separately list 27 hours for the case. It also has an IPX5 rating for sweat and light rain. The design is described as suitable for glasses wearers, and its audio system is listed as a planar magnetic driver with a low-leakage feature.
I’d favor mifo for someone who wants a light open-ear option for exercise, commuting, or moving between devices. Its case makes it the more convenient choice when charging between listening sessions is difficult. The trade-off is that its water rating is IPX5, while Syohoxi is listed at IP56, and it does not use the bone-conduction setup specified for Syohoxi.
For a bedtime routine, mifo’s light weight and open-ear shape may sound appealing, especially if traditional in-ear headphones are uncomfortable. But the specifications do not say that it is designed for sleeping or confirm how it feels when lying on an ear. I would treat it as a general open-ear headset rather than assume it is a dedicated sleep solution.
• Best fit for bone-conduction listening → Syohoxi Ultra-Comfortable Open-Ear sport. Its listed driver type is bone conduction; mifo lists a planar magnetic driver.
• Best for switching between two devices → mifo FiiTii Z Open. It supports simultaneous pairing with two devices.
• Best for a quick top-up before heading out → Syohoxi Ultra-Comfortable Open-Ear sport. A 5-minute charge is specified to provide up to 30 minutes of playback.
• Best for extra playback with a charging case → mifo FiiTii Z Open. Its case brings the stated total battery life to up to 35 hours.
• Best for a specifically stated low weight → mifo FiiTii Z Open. Its weight is listed as 5.9 g.
• Best listed water rating → Syohoxi Ultra-Comfortable Open-Ear sport. It is rated IP56, compared with mifo’s IPX5; neither is described as suitable for swimming.
• Best for outdoor awareness through an open-ear design → Either, with a feature distinction. Both are open-ear models; Syohoxi specifically highlights bone conduction and awareness of surrounding sounds.
• Best starting point for sleeping → Neither is a clear sleep-specific pick. If choosing between them, weigh Syohoxi’s quick charge against mifo’s light design, but don’t assume either will suit your preferred sleeping position.
The phrase “rotatable ear cups earbuds for sleeping” can describe a kind of product shoppers may be seeking, but neither product’s supplied details list rotatable ear cups. Both are open-ear designs with hooks, so I would not buy either on the assumption that its ear pieces rotate for sleep.
Likewise, shoppers looking for the best crystal clear calls wireless headset for sleeping should focus on the call features rather than expect sleep-specific engineering. Syohoxi lists call noise cancellation, while mifo describes ENC call noise cancellation and wind-noise reduction. Those details support a call-focused comparison, not a guarantee of call clarity in every setting.
My Verdict
In my opinion, I’d buy the mifo FiiTii Z Open if I wanted one open-ear pair for exercise and everyday listening: its 5.9 g weight, dual-device connection, and case-assisted total playback give it the more flexible setup.
FAQ
Neither is identified as a sleep-specific headphone. mifo lists a 5.9 g weight, while Syohoxi lists bone conduction and an open-ear design. The available specifications do not establish comfort when lying on your side.
Both list up to 8 hours of playback from the headphones. mifo adds a charging case, with total battery life stated as up to 35 hours; Syohoxi instead specifies a quick charge that provides up to 30 minutes of playback after 5 minutes.
Syohoxi lists built-in call noise cancellation. mifo describes ENC call noise cancellation and says it reduces wind noise during slower rides. Those features may help in noisy or breezy situations, but the listings do not establish that one will sound better in every call.
Syohoxi is rated IP56, while mifo is rated IPX5 and described as suitable for sweat and light rain. Neither is described as suitable for swimming. For either product, follow its care guidance and don’t treat a water rating as permission to submerge it.
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