How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 6 min read · Independent comparison
• km5 Hp1 — biggest strength: Just 3.6 oz (103g) with a "new-retro" minimalist look, magnetic interchangeable ear pads, and USB-C lossless audio as a wired fallback.
• km5 Hp1 — biggest trade-off: On-ear fit and a 40mm driver mean less isolation and less bass weight than a big over-ear; 24 hours of playtime is modest next to the competition here.
• H2O Audio Betty x RIPT — biggest strength: 100% sweatproof with washable silicone ear cushions, 30 dB of RIPT active noise cancellation, and up to 50 hours of battery.
• H2O Audio Betty x RIPT — biggest trade-off: Over-ear bulk and a sportier, gym-forward design that's less of a lifestyle fashion piece; Bluetooth 5.2 instead of 5.4.
• Pick km5 Hp1 if you care most about weight, looks, and everyday commuting.
• Pick H2O Audio Betty x RIPT if you care most about sweat, battery life, and training-grade durability.
The Hp1 is a design-led on-ear headphone. At 3.6 oz (103g), it's the kind of thing you forget you're wearing — which matters more than spec sheets suggest if you keep headphones on through a full workday or a long commute. The "new-retro" styling, polished finish, and two minimalist colorways (this one in White) are clearly meant to be seen, not hidden in a bag. It was developed to pair with km5's CP Series wireless CD players, so there's a coherent aesthetic story here rather than a generic gadget look.
Functionally, you get Bluetooth 5.4 for a stable wireless connection, Adaptive Noise Cancellation, and a Transparency Mode when you need to hear the world around you. The 40mm dynamic drivers are a mainstream, well-understood choice — expect punchy, dynamic sound rather than audiophile neutrality. The genuinely interesting extras are the interchangeable magnetic fabric ear pads (two color options in the box, so you can change the look) and USB-C wired listening, which lets you skip Bluetooth entirely for lossless audio. Playtime is up to 24 hours per charge.
H2O Audio Betty x RIPT: Who It's For
The Betty x RIPT is unapologetically an athlete's headphone. The headline claim is 100% sweatproof construction with patent-pending removable silicone ear cushions that are fully washable — a real, practical difference if you train back-to-back and don't want yesterday's sweat sitting in your pads. H2O Audio also includes a second pair of premium leatherette cushions for travel, recovery, and everyday wear, so you're effectively getting two personalities in one headphone.
On the audio side, custom 45mm drivers cover a 20Hz–20kHz range with what the brand describes as deep, immersive bass and crisp highs. That's a bigger driver than the Hp1's 40mm, and over-ear cups seal around your ears rather than pressing on them, which typically means more low-end weight and better passive isolation. RIPT (Real Isolation Performance Tech) adds 30 dB of active noise cancellation — a specific figure the Hp1 sheet doesn't state — aimed at gym chatter, travel hum, and pre-race noise. Transparency Mode is there for outdoor runs and cycling when full isolation isn't safe.
Battery is the standout: up to 50 hours per charge, more than double the Hp1. Bluetooth 5.2 with multipoint lets you stay connected to two devices at once and switch between them, and there's a 3.5mm jack for wired use plus a built-in mic with physical push-button controls you can find by feel mid-workout. A protective case and ear cushions are included.
Who should buy it: runners, cyclists, lifters, swimmers-adjacent athletes, and frequent travelers who want one rugged pair for everything. The washable silicone cushions and 50-hour battery are the reasons. Who should skip it: people who want a slim, fashion-forward headphone for the office, and anyone who prefers the newest Bluetooth version — this is 5.2, not 5.4.
• Best for all-day light comfort → km5 Hp1. At 3.6 oz it's dramatically lighter than a typical over-ear.
• Best for sweat and hygiene → H2O Audio Betty x RIPT. 100% sweatproof with fully washable silicone ear cushions.
• Best for battery life → H2O Audio Betty x RIPT. Up to 50 hours versus up to 24 hours.
• Best for noise cancellation depth → H2O Audio Betty x RIPT. RIPT is rated at 30 dB; km5 doesn't publish an equivalent figure.
• Best for style and outfit-matching → km5 Hp1. New-retro design, two colorways, and swappable magnetic fabric pads.
• Best for the newest wireless standard → km5 Hp1. Bluetooth 5.4 versus 5.2.
• Best for wired lossless listening → km5 Hp1. USB-C audio in, not just a 3.5mm analog jack.
• Best for two-device switching → H2O Audio Betty x RIPT. Bluetooth multipoint connects to two devices at once.
• Best for big, bass-forward sound → H2O Audio Betty x RIPT. 45mm over-ear drivers versus 40mm on-ear.
• Best for gym, run, and travel abuse → H2O Audio Betty x RIPT. Sport build, protective case, washable pads.
In my opinion, most buyers should pick based on where the headphones will live. If they'll live on your head at a desk, on a train, or around your neck as part of your look, I'd buy the km5 Hp1 — the 3.6 oz weight, the swappable magnetic pads, and USB-C lossless audio are genuinely useful, and 24 hours is plenty for that routine. If they'll live in a gym bag and get sweated on, I'd buy the H2O Audio Betty x RIPT without hesitation: 50 hours, washable silicone cushions, 30 dB of ANC, and multipoint are exactly what training demands. For a single do-everything pair, the RIPT covers more ground; for a single look-good-everywhere pair, the Hp1 wins.
The Betty x RIPT, clearly. It's built as a 100% sweatproof sport headphone with removable, fully washable silicone ear cushions. The km5 Hp1 is an on-ear lifestyle headphone with fabric pads, which isn't the right material for heavy sweating.
H2O Audio publishes a specific figure for RIPT: 30 dB of active noise cancellation. km5 describes the Hp1 as having Adaptive Noise Cancellation but doesn't state a dB rating, so on paper the RIPT gives you the more defined isolation claim.
I don't list prices here because they change often. Use the "Check latest price on Amazon" button on this page to see the current price for each before you decide.
The H2O Audio Betty x RIPT is rated up to 50 hours per charge; the km5 Hp1 is rated up to 24 hours. For daily commuting, 24 hours is fine. For long training blocks, travel, or forgetting to charge, 50 hours is a real advantage.
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.