If you want a single replacement earbud with Bluetooth, active noise cancellation, and transparency mode for study, choose TOYOURKI Single Left Ear; if you need a low-profile fit for side-sleeping and around six hours of bedtime listening, choose Mudtun Sleep Earbuds Ultra-Thin.
For a desk, TOYOURKI’s stated noise-control features make it the more versatile pick; for lying on your side, Mudtun’s thin, curved design is the clearer fit.
If you want a single replacement earbud with Bluetooth, active noise cancellation, and transparency mode for study, choose TOYOURKI Single Left Ear; if you need a low-profile fit for side-sleeping and around six hours of bedtime listening, choose Mudtun Sleep Earbuds Ultra-Thin.
For a desk, TOYOURKI’s stated noise-control features make it the more versatile pick; for lying on your side, Mudtun’s thin, curved design is the clearer fit.
These solve different problems, so the right choice comes down to whether you are replacing a Beats Studio Buds earbud or prioritizing nighttime comfort.
TOYOURKI Single Left Ear vs Mudtun Sleep Earbuds Ultra-Thin at a Glance
• TOYOURKI’s biggest strength: It is presented as a replacement for a lost Beats Studio Buds earbud, with Bluetooth 5.2, touch controls, active noise cancellation, and transparency mode. Trade-off: It is a single left earbud, not a complete pair, and it is specified for Beats Studio Buds—not Buds+.
• Mudtun’s biggest strength: Its ultra-thin, curved design is aimed at side-sleeping, with physical buttons and about five to six hours of playback per charge. Trade-off: It uses passive noise blocking rather than active noise cancellation.
• For TOYOURKI: Choose it if you already own compatible Beats Studio Buds and need to replace the left earbud.
• For Mudtun: Choose it if your priority is a low-profile pair for sleep, naps, or quiet listening.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-20 · 6 min read · Independent comparison
TOYOURKI is a very specific purchase: one left earbud intended to replace a lost Beats Studio Buds earbud. The product information says it is not for Beats Studio Buds+, so checking your existing model matters before choosing it. It uses Bluetooth 5.2 and touch controls, and its listed noise-control features include active noise cancellation. The product description also names transparency mode.
That combination makes it the more relevant option for study if you are already using compatible Beats Studio Buds and want to restore the functions associated with your set. ANC can help reduce outside sound, while transparency mode is intended for hearing more of your surroundings. The listing describes the replacement as working with the existing charging case, but this is not a general-purpose set of earbuds to buy for a first-time listener.
The main trade-off is simple: this is a single left earbud, not two earbuds and a charging case. I would skip it if you need a complete pair, want a dedicated sleep design, or own Beats Studio Buds+. It also should not be mistaken for the best over ear headphones for study: it is an in-ear replacement bud, not an over-ear headphone.
Mudtun is built around a different use. Its low-profile, curved shape is intended to sit along the ear rather than go deeply into the ear canal, with side-sleeping comfort as a central design goal. The earbuds use physical buttons, which the product description says can help avoid accidental touch input while lying down. It also states that there are no low-battery beeps to disturb sleep.
The feature set suits bedtime listening more directly than focused desk work. Mudtun is described for white noise, ASMR, audiobooks, podcasts, and relaxing music, with adjustable bass levels. Playback is listed at about five to six hours on a full charge, and the case provides additional power. It uses Bluetooth 5.4 and passive noise blocking; importantly, it does not include ANC.
That absence is the clearest limitation for anyone seeking active noise reduction. Passive isolation may help physically reduce outside sound, but it is not the same feature as active noise cancellation. Mudtun could still suit quiet study with audio playing, but the product information does not list transparency mode or ANC. If your priority is a small earbud for lying on your side, though, its design is much more directly aligned with that need than a replacement Beats bud.
• Best for replacing one lost Beats Studio Buds earbud → TOYOURKI. It is described as a single left replacement for Beats Studio Buds and is not intended for Buds+.
• Best for side-sleeping → Mudtun. Its ultra-thin, curved, low-profile form is specifically designed to reduce pressure when your ear rests against a pillow.
• Best for active noise cancellation → TOYOURKI. ANC is listed among its features; Mudtun explicitly relies on passive noise blocking and does not include ANC.
• Best for transparency mode → TOYOURKI. Transparency mode is named in its feature description. Mudtun’s listed noise control is sound isolation.
• Best for physical buttons at bedtime → Mudtun. Its push-button controls are intended to reduce accidental inputs while lying down.
• Best for a complete sleep-listening pair → Mudtun. Its product information describes two sleep earbuds and a charging case, while TOYOURKI is one replacement earbud.
• Best for a single replacement purchase → TOYOURKI. That is its specific role, provided your existing earbuds are compatible Beats Studio Buds.
• Best for checking remaining case battery at a glance → Mudtun. Its description lists an LED digital display on the charging case.
The study comparison needs a little care. If you are searching for the best open ear earbuds for study, neither product is described as open-ear: both are in-ear buds. Mudtun is designed not to sit deeply in the canal, but that does not make it an open-ear model. Likewise, neither is an over-ear headphone. The useful distinction here is that TOYOURKI lists ANC and transparency mode, while Mudtun prioritizes a low-profile fit and bedtime controls.
The phrase best transparency mode headphone for study points more clearly toward TOYOURKI, but with a caveat: this is a single replacement earbud, not a full headphone set. Its transparency feature is relevant if you need to stay more aware of nearby sound, while ANC may suit a quieter listening environment. Mudtun’s passive blocking and relaxed-listening focus are aimed at a different routine.
My Verdict
For study, I would choose TOYOURKI if I already owned compatible Beats Studio Buds and needed to replace the left bud. Its listed ANC and transparency mode give it the more study-relevant feature set of these two.
If I were buying specifically for sleeping on my side, I would choose Mudtun instead: its low-profile shape, physical buttons, and roughly five-to-six-hour playback target fit that job better.
I would not treat either as a universal winner; I would match the choice to the task and confirm the Beats model before ordering TOYOURKI.
No. The product information specifically says it is not for Beats Studio Buds+. It is described as a replacement for Beats Studio Buds, so confirm which model you have before choosing it.
No. Mudtun is described as using passive noise blocking and does not include ANC. TOYOURKI lists active noise cancellation, along with transparency mode.
That is their stated design purpose. They have an ultra-thin, low-profile shape intended to reduce pressure when lying on your side, plus physical buttons intended to limit accidental inputs during sleep.
That depends on what you already own and what you need. TOYOURKI is a single replacement for compatible Beats Studio Buds, while Mudtun is a sleep-focused pair with a case; check the current price on Amazon using the page’s price button, then compare it with your intended use.
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