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If you want a case built specifically for your Sony MDR-ZX110 on-ear headphones, choose RIYADAone Case; if you need a larger case that fits multiple on-ear and over-ear models with room for cables, choose casmilee Headphone Case Compatible. That's the short version. Now here's the reasoning.
• RIYADAone Case — biggest strength: Purpose-built for the Sony MDR-ZX110 / MDRZX110AP / MDRZX110NC / MDR-ZX310AP ZX Series, with a lightweight shockproof EVA hard shell and a mesh organizer bag. It's the more targeted, travel-focused pick.
• RIYADAone Case — biggest trade-off: It's a case only (headphones not included), and it's deliberately sized around the Sony ZX Series — so it's not the right fit if you own a different brand or an over-ear model.
• casmilee Headphone Case Compatible — biggest strength: Broad "universal" compatibility across Sony WH-CH520, WH-1000XM4, JBL Tune 720BT and JBL 510BT, plus a mesh pocket for cables and a carry handle. It fits more headphones.
• casmilee Headphone Case Compatible — biggest trade-off: Its water resistance level is listed as not water resistant, and it's a case only (box only) — the headphones aren't included.
• Who RIYADAone Case is for: Sony ZX Series on-ear owners who want a snug, lightweight, shockproof travel shell.
• Who casmilee Headphone Case Compatible is for: Anyone with a Sony or JBL on-ear/over-ear set who wants one roomier case with accessory storage.
The RIYADAone Case is the specialist of the two. Its compatibility list is narrow and specific: the Sony MDR-ZX110, MDRZX110AP, MDRZX110NC, and MDR-ZX310AP ZX Series. That narrowness is the whole point. Because it's designed around one family of on-ear headphones, the interior should hold that shape closely, with less sloshing around than a one-size-fits-all bag.
The build is a hard shell in grey Ethylene Vinyl Acetate (EVA), which is the same class of foam-like material you see in a lot of lightweight protective cases — rigid enough to resist crushing, light enough not to weigh you down. The whole thing comes in at 100 g, so it barely registers in a bag. There's also a mesh bag organizer for a cable or a small accessory, and the headline feature set describes it as shockproof, portable, and lightweight for travel.
Who should buy it? If your daily headphones are the Sony MDR-ZX110 or a sibling in that ZX line, this is the more precise match. It's a case you toss in a backpack or carry-on and forget about until you need it. The 1-year warranty description adds a bit of reassurance for a travel accessory that's going to get knocked around.
Who should skip it? If you own anything outside that Sony ZX list — a JBL Tune, a WH-1000XM4, a different brand entirely — this isn't your case. And remember the listing is case only: the headphones are not included, so you're buying storage, not sound. If you want maximum flexibility or a bigger volume of interior space, the other option wins on that front.
The casmilee case plays the opposite game: it's the generalist. Its compatibility list is broader, covering Sony WH-CH520, Sony WH-1000XM4, JBL Tune 720BT, and JBL 510BT, and the listing describes it as designed to fit most on-ear and over-ear headsets. That's a meaningful difference in who it serves — if you've got one over-ear set for commuting and another for the gym, or you switch brands, one case can plausibly cover both.
The exterior is a hard shell in cationic Oxford cloth (polyester) — a fabric-faced shell that reads as durable and scuff-resistant rather than glossy plastic. The listing emphasizes rugged drop, bump and scratch protection and a sturdy, scratch-resistant build, which is exactly the pitch you want for something living in a gym bag or office drawer. There's a convenient mesh pocket for charging cables, audio cords and ear tips, a smooth zipper, and a carry handle. The portable travel design is clearly aimed at commuters and travelers who want the case to slip into a handbag or suitcase. It's listed in yellow, sold as box only, and comes with a 1-year warranty description.
One honest caveat: the water resistance level is listed as not water resistant. So this is a protection-from-impact case, not a protection-from-rain case. Treat it accordingly.
Who should buy it? Anyone with a Sony or JBL on-ear/over-ear set who wants one roomy, organized case with cable storage and a handle. Who should skip it? Someone who wants the tightest possible fit for a specific Sony ZX model — that's where the RIYADAone wins — or anyone who expects water resistance.
• Best for a snug, model-specific fit → RIYADAone Case (built for the Sony MDR-ZX110 / ZX Series).
• Best for broad compatibility → casmilee Headphone Case Compatible (Sony WH-CH520, WH-1000XM4, JBL Tune 720BT, JBL 510BT, plus most on-ear/over-ear).
• Best for genuinely lightweight carry → RIYADAone Case (listed at 100 g).
• Best for cable and accessory organization → casmilee Headphone Case Compatible (mesh pocket plus handle).
• Best for on-ear headphones specifically → RIYADAone Case; the casmilee leans over-ear-friendly too.
• Best for over-ear headphones → casmilee Headphone Case Compatible.
• Best shell material for a fabric feel → casmilee Headphone Case Compatible (cationic Oxford cloth over a hard shell).
• Best shell material for a molded, foam-like feel → RIYADAone Case (EVA hard shell).
In my opinion, if you own the Sony MDR-ZX110 or another ZX Series on-ear, buy the RIYADAone Case. It's the purpose-built option: lighter at 100 g, molded around your exact headphones, and clearly designed for travel. But if your headphones are a Sony WH-1000XM4, a JBL Tune, or any over-ear set — or you want one case to cover more than one pair — I'd buy the casmilee Headphone Case Compatible instead. Its wider compatibility, mesh pocket and carry handle simply do more for more people. Check the current price on Amazon before you commit, since both are budget travel accessories and the difference in outlay is usually small.
what are the best open ear headphones
This comparison doesn't cover open-ear models — both cases are storage accessories for on-ear and over-ear headphones. Judging "best" open-ear headphones comes down to your fit and sound priorities, not to either case here.
are on ear headphones good
Yes, for many people. They're lighter and more portable than over-ear sets, which is exactly why cases like the RIYADAone (built for the Sony ZX Series) and the casmilee (which fits on-ear sets too) exist — on-ears are the travel-friendly compromise.
are open ear headphones good
Open-ear designs can suit people who want to stay aware of their surroundings, but they're a different category from the on-ear and over-ear headphones these two cases are made to hold. Neither case is designed for open-ear models.
what are the best in-ear headphones
That's outside this comparison. Both the RIYADAone and casmilee cases are built for on-ear and over-ear headphones, not in-ears, so neither is the right storage pick for earbuds.
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