This review is based on HAKII's own product page for the HAKII MIX Smart Headband Headphones. We have not personally worn or tested this pair — our goal is to lay out the manufacturer's specs, materials, and pricing clearly so you can judge fit before buying.
The MIX is an open-ear headphone built into a sports sweatband rather than a traditional earbud or over-ear design. Instead of sitting in or on the ear, the drivers sit near the ears inside the headband itself, using what HAKII calls Directional Sound with patented abTube technology to aim audio at the wearer while limiting how far it spreads to people nearby. HAKII markets this specifically at runners, cyclists, and other outdoor athletes who want music or calls without blocking ambient sound.
According to HAKII, the abTube technology balances the two speaker drivers to cancel out far-field sound spread, so audio is only clearly audible to the wearer (the brand's own claim is medium volume audible within about 1 meter/3.28 feet outdoors). This differs from bone conduction headphones, which HAKII's own comparison chart on the page describes as having an "unnatural" listening experience due to vibration; the MIX is positioned as sounding closer to standard headphones while keeping the ears uncovered.
The MIX comes with two interchangeable elastic sweatbands (Size S: 22 x 3.2cm, fits 52–55cm head circumference; Size M: 25 x 3.2cm, fits 56–59cm), plus a Size L option sold separately (28cm, fits 60–63cm) for larger head sizes. Fit is fine-tuned with adjustable magnetic clips on both sides of the band. The full unit (body plus elastic band) weighs 90g, and the body itself measures 36.8 x 3.7 x 2.2cm.
The MIX runs on Bluetooth 5.3 with a listed working range of 15 meters (barrier-free), and HAKII states this generation offers stable, low-latency connections suitable for calls and video. Calls are handled through two built-in microphones using beam-forming array technology aimed at reducing background noise, controlled via a simple 3-button layout that also handles music playback and voice assistant access (Siri or equivalent).
The MIX carries an IPX5 water-resistance rating. Because it's built into a headband rather than an earpiece, HAKII also highlights that the sweatband itself physically blocks sweat from running down into the eyes and face during intense activity, which is a secondary benefit beyond the IPX5 rating on the electronics.
At the time of writing, the HAKII MIX (Blue colorway) is listed at $169.99. HAKII also sells a Black colorway and related products in the same headband/visor/hat family (MIXV visor headphones, MIXC music hat) at similar price points. The listing includes free shipping to a large number of countries and a stated 30-day risk-free trial with a 1-year warranty.
The product page shows 43 customer reviews, with the majority landing at 4 or 5 stars at the time of writing. Common praise points include comfort for long runs, the novelty of having speakers/mic built into a familiar sweatband form factor, and sound quality reviewers describe as better than other open-ear earbuds they'd tried. A couple of reviews raised order-fulfillment or shipping mix-up issues unrelated to the product itself. We're relaying these as displayed on the page; we haven't independently verified individual buyer experiences.
Potential advantages: large 22mm drivers relative to typical earbuds, genuinely open-ear design that doesn't block ambient sound, sweatband doubles as sweat protection, swappable band sizes with magnetic fit adjustment, and a fast-charge option for quick top-ups between sessions.
Things to weigh: IPX5 is sweat/splash resistant rather than fully waterproof, so it isn't rated for swimming, the open-ear design trades some audio isolation and bass presence for situational awareness, and the higher price point ($169.99) sits above many standard open-ear or bone-conduction competitors.
Based on the listed specs, the HAKII MIX suits runners, cyclists, and outdoor athletes who specifically want to hear their surroundings (traffic, other people, coaching cues) while still listening to music or taking calls, and who don't mind wearing a sweatband-style headphone instead of in-ear buds.
On paper, the HAKII MIX combines a genuinely different open-ear form factor with above-average driver size, useful battery specs (8 hours plus fast charging), and sweat-blocking practicality baked into the headband design. It's a specialist product built for outdoor training rather than a general-purpose earbud replacement, and the price reflects that positioning.
Check current pricing, colorways, and sizing directly on the official product page: View the HAKII MIX deal.
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