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Updated: 2026-09-18 · 7 min read · Independent comparison
If you want real over-ear headphones with a wired connection, a sling headband and a lifetime warranty, choose Koss UR20; if you need a soft drawstring pouch to store and carry over-ear headphones you already own, choose Cosmos 2. These two products share almost nothing except the word "headphones" — one is the listening device, the other is the bag you put it in. That's the whole decision in one line.
• Koss UR20 — biggest trade-off: It's a wired, fixed-cord design, so there's no wireless freedom, and the sling headband is a distinctive fit that not everyone loves at first wear.
• Cosmos 2 — biggest strength: Two soft nylon/polyester drawstring pouches per pack, roughly 10" x 8.5" when flattened, that protect over-ear headphones, gaming headsets and neckband earphones from dust, scratches and knocks.
• Cosmos 2 — biggest trade-off: It makes no sound at all. If you don't already own headphones, this product does nothing for you on its own.
• Who each pick is for: Koss UR20 → anyone who wants a wired headphone for studio, office or home listening. Cosmos 2 → anyone who already owns headphones and wants cheap, simple protection and storage for them.
The UR20 is a wired, over-ear headphone built around a sling-style headband — the kind of flexible band that rests across the top of your head and lets you flip one earcup off for single-sided listening. That single design choice tells you a lot about who it's meant for. It's a working headphone, not a fashion accessory. The faux-leather over-the-ear cushions are there to create a seal around the ear, and the breathable mesh in the band is there so long sessions don't turn into a sweat-fest.
On the audio side, the spec sheet is genuinely interesting for the money-conscious buyer. A frequency range of 18Hz to 24kHz covers well below and well above what most people can hear, and the 16-ohm impedance is low — which means it's easy to drive from a phone, a laptop, a mixer or a portable player without needing a dedicated amp. The neodymium rare-earth magnet and 16-micron mylar element are the ingredients behind the claimed deep bass and treble clarity, and the dynamic driver handles the rest. In my opinion, that low impedance plus the two included plug sizes (1/8-inch and 1/4-inch) is the real story here: it's a headphone designed to plug into almost anything in a home, studio or office setup.
Then there's the 8-foot straight, single-entry cord. Eight feet is long by headphone standards. That's a deliberate choice for people sitting at a desk, at a mixing position, or moving around a room without yanking the cable out of the jack. If you're a deejay or you work at a console, that length matters more than wireless convenience ever will.
Cosmos 2: Who It's For
The Cosmos 2 is not a headphone. It's a two-pack of soft drawstring pouches, and once you accept that, it's easy to judge on its own terms. Each bag measures roughly 10 inches by 8.5 inches when flattened, made from nylon and polyester with a double drawstring closure and an integrated drawstring handle. There's one compartment, no padding structure, no hard shell — just soft fabric that closes with a cinch.
That simplicity is the point. A soft pouch protects against the everyday stuff that actually damages headphones: dust settling on the drivers and cushions, scratches across the cups, and the wear that comes from tossing a headset loose into a backpack next to keys, chargers and a water bottle. The double drawstring means you can open and close it one-handed and it stays shut in a bag. The integrated handle lets you hang it off a hook or a backpack loop.
Who is this for? Gamers who own an over-ear gaming headset and want it off the desk when not in use. Commuters and students who carry a headset in a bag every day. Anyone with multiple pairs — the two-pack means one bag for the main headphones and one for a spare, a neckband set, or a pair of earbuds in a case. Buy the Cosmos 2 if you already own over-ear headphones or a gaming headset and want a cheap, light, no-fuss way to store and carry them. Skip it if you're shopping for something to actually listen with — it makes no sound, and it isn't a hard case, so it won't survive being crushed at the bottom of a packed suitcase the way a rigid shell would.
One honest caveat straight from the product's own notes: check the size against your headphones before buying. At about 10" x 8.5" flattened, it comfortably fits most over-ear headphones, but a large gaming headset with a boom mic or a wide headband could be tight.
Side-by-Side: Which Should You Choose?
• You already own headphones and just want to protect them → Cosmos 2. Two pouches, soft nylon/polyester, drawstring closure.
• Best for plugging into lots of different gear → Koss UR20. 16-ohm impedance plus both 1/8-inch and 1/4-inch stereo plugs included.
• Best for long cable runs at a desk or console → Koss UR20. The straight single-entry cord is 8 feet long.
• Best for travel and storage of existing gear → Cosmos 2. Light, soft, packable, and you get two of them.
• Best for single-sided monitoring → Koss UR20. The sling headband is designed to let you flip one cup off your ear.
• Best for multiple headphones in one household → Cosmos 2. The two-pack covers a main pair and a spare.
• Warranty matters to you → Koss UR20. The spec sheet lists a lifetime warranty; the Cosmos 2 carries no such claim.
If I had to pick one, I'd buy the Koss UR20 — because it's the product that actually does something. It gives you a wired over-ear headphone with a low-impedance, wide-range driver spec, an 8-foot cord, two plug sizes and a lifetime warranty, which together make it a genuinely flexible tool for home, studio and deejay use. The Cosmos 2 is a perfectly sensible accessory, but only as an add-on. My honest recommendation: buy the UR20 for listening, and add the Cosmos 2 two-pack if you want somewhere safe to put your headphones when you're not wearing them. Check the current price on Amazon before you commit, since that's the one thing that could change the math.
They're not competitors. The UR20 is a wired over-ear headphone; the Cosmos 2 is a two-pack of soft drawstring storage pouches. The UR20 is "better" only in the sense that it produces sound — the Cosmos 2 is an accessory for headphones you already own.
Does the Cosmos 2 come with headphones?
No. The package includes two black carrying bags only. It fits most over-ear headphones, gaming headsets and neckband earphones, but you supply the headphones yourself.
Yes. It terminates in a 3.5mm (1/8-inch) plug and also includes a 1/4-inch stereo plug for home stereo and studio gear. With 16-ohm impedance it's easy to drive from portable devices.
Not strictly, but it's a sensible pairing. The UR20 is an over-ear headphone with a long fixed cord, and a soft drawstring pouch is a simple way to keep it dust-free and protected between sessions. If you'd rather not deal with a bag, the UR20 works fine on its own.
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