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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-24 · 7 min read · Independent comparison
• Otium's biggest strength: a genuine IPX7 waterproof rating paired with soft silicone earhooks and four eartip sizes, which is exactly the combination you want for sweat-heavy training.
• Otium's biggest trade-off: the older Bluetooth generation and a shorter per-charge runtime mean you'll be reaching for the charger more often.
• Matast's biggest strength: a huge total playtime courtesy of a digital-display charging case, plus Bluetooth 5.4 and four microphones for clearer calls.
• Matast's biggest trade-off: the 45° hooks are flexible rather than rigid, so riders and heavy sweaters may find the fit shifts more than a stiff hook would.
• Buy Otium if you want fuss-free physical buttons, a sub-20-gram bud, and the confidence of a fully submersible rating.
• Buy Matast if you want long battery life, touch controls, and the newest wireless standard in a single package.
The Otium set is built around one idea: stay put and survive sweat. The IPX7 rating is the headline here. That's the same water-resistance class used for gear that gets submerged, so rain, heavy perspiration, and an accidental splash at the gym sink are all well within its comfort zone. If you've ever killed a pair of cheap earbuds in a single summer of running, that rating alone is worth paying attention to.
The fit system backs it up. You get four eartip sizes — XS, S, M, and L — plus soft silicone earhooks and an optional wire clip to keep the cable from whipping around. That's a lot of adjustability for a sport bud, and it's the reason the Otium works for people with narrow ear canals who normally can't keep hooks in place. At roughly 20 grams, it's light enough that you'll forget it's there mid-set.
Control is where the Otium leans old-school, and I mean that as a compliment. Everything runs through physical buttons on the headset, so you can skip, pause, and take calls without pulling out your phone — and without the mis-taps that plague touch panels when your fingers are sweaty. The built-in mic also announces incoming calls by voice, which is genuinely useful when your phone is zipped in a running belt.
Who should buy it: runners, gym-goers, and anyone who sweats hard and wants buttons instead of touch. Who should skip it: frequent flyers and all-day listeners who need multi-day battery, and anyone who has already moved their whole kit to USB-C.
Matast Earbuds: Who It's For
Matast takes the opposite approach and wins on endurance. Each bud runs about 8 hours on its own, and the charging case pushes total playback to roughly 50–60 hours — enough that a week of commutes and workouts passes without you thinking about a cable. The case makes that number easy to trust, too: a dual LED display shows the exact charge percentage from 1% to 100% while it tops the buds up, so you always know where you stand instead of guessing from a blinking light.
The audio hardware is the more ambitious of the two. Matast uses 14.2 mm graphene drivers in a four-chamber design, with a frequency range that stretches from 18Hz up to 25kHz — deeper at the bottom and wider at the top than the 20Hz–20,000Hz range on the Otium. Graphene drivers are typically chosen for tight, controlled bass, and that extended low end is the spec that matters if you listen to hip-hop, EDM, or anything with real sub-bass. Four microphones handle calls with environmental noise cancellation, which is the feature that decides whether people can actually hear you on a windy street.
Connectivity is the other clear gap. Bluetooth 5.4 brings lower latency and lower power draw than the older standard, and the transmission range is rated at 15 meters versus 10 on the Otium — a small difference on paper, but it means you can leave your phone on a bench and walk to the far end of the weight room. There's also a dual-use mode: run both buds for stereo, or take one out and share the other, which is handy for podcasts and for anyone who likes keeping one ear open on a run.
Fit is handled with 45° flexible ear hooks and three eartip sizes (S, M, L), and the IP7 nano-coating on the internal components handles sweat and rain. Controls are touch-based, covering play/pause, volume, calls, and voice assistant. The case reopens and auto-reconnects thanks to a hall sensor, and a 10-minute USB-C top-up buys about 2 hours of playback. The warranty runs two years.
Who should buy it: commuters, travelers, and long-session listeners who hate charging, plus call-heavy users who need the mic array. Who should skip it: anyone who specifically wants tactile buttons, and people with very small ears who benefit from the Otium's XS eartip option.
• Best for battery life → Matast Earbuds. Roughly 8 hours per bud and a case that stretches total playtime toward 50–60 hours beats a single 9-hour charge every time.
• Best for water confidence → Otium Headphones. IPX7 is the stronger rating on paper, and it's paired with a secure hook-and-clip system.
• Best for call clarity → Matast Earbuds. Four microphones with ENC noise cancellation are built for voice, not just music.
• Best for sweat-proof button control → Otium Headphones. Physical buttons are far more reliable than touch when your hands are wet.
• Best for bass and detail → Matast Earbuds. The larger graphene drivers and wider 18Hz–25kHz range point to fuller low-end output.
• Best for staying connected at a distance → Matast Earbuds. Bluetooth 5.4 with a 15-meter rated range gives you more room to roam.
• Best for small ears → Otium Headphones. Four eartip sizes, including XS, simply fit more people out of the box.
• Best for charging convenience → Matast Earbuds. USB-C plus a percentage display on the case is the more modern setup.
If I were buying one pair for myself, I'd take the Matast Earbuds. The combination of Bluetooth 5.4, a USB-C case with a real battery readout, roughly 50–60 hours of total playback, and the larger graphene drivers covers the widest range of everyday situations — commutes, gym sessions, calls, and travel — without constant charging. In my opinion, the Otium remains the smarter pick for one specific buyer: someone who trains hard, sweats heavily, and wants tactile buttons and the stronger IPX7 rating above all else. Everyone else gets more long-term value from the Matast.
Both are designed for it. Otium leans on a stiffer earhook, four eartip sizes, and an IPX7 rating, which suits heavy sweaters. Matast uses flexible 45° hooks and IP7 coating, and adds a mono mode so you can keep one ear open on the road.
Otium is rated around 9 hours of playback per charge, with a 1.5-hour charge time. Matast gives about 8 hours per bud but stretches to roughly 50–60 hours total with the case, and a 10-minute USB-C charge adds about 2 hours.
Yes. Both are standard Bluetooth wireless earbuds, so they pair with phones, tablets, laptops, and most TVs. Matast uses Bluetooth 5.4 and Otium uses Bluetooth 5.1, but neither is locked to a platform.
Value depends on what you weight. If you want maximum battery and the newest connectivity, Matast delivers more per charge cycle. If you want the strongest water rating and physical controls, Otium is the more targeted buy. Check the current price on Amazon before deciding, since that's the number most likely to tip the scale.
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