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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a hard-shell, maximum-protection case with a locking lid and a cleaning kit, choose Olytop Bose QuietComfort; if you need a soft, slim silicone cover that stays flexible and charges without removal, choose FJIASTB Case.
• Olytop Bose QuietComfort — biggest strength: Military-grade hard shell with an integrated lock clip that keeps the lid shut, plus a 3-in-1 cleaner kit and carabiner in the box.
• Olytop Bose QuietComfort — biggest trade-off: It's a bulky, two-piece hard case that is not water resistant, and the heavy-duty build adds noticeable size to your pocket or bag.
• FJIASTB Case — biggest strength: Soft, skin-friendly silicone that's waterproof and shockproof, with an integrated flip cover that won't fall off and charging without disassembly.
• FJIASTB Case — biggest trade-off: It fits only the Bose QuietComfort Ultra Earbuds II (2nd Gen, 2025), and the soft shell offers less rigid impact protection than a hard case.
• Who Olytop is for: Buyers who want rugged, locked-down protection and don't mind extra bulk.
• Who FJIASTB is for: Buyers who want a light, flexible, waterproof cover that stays on during charging.
The Olytop case is built around one idea: keep the earbuds shut and keep them safe. It uses a two-piece hard design that lets the Bose QuietComfort Ultra Earbuds open flexibly, but the standout feature is the integrated locking mechanism. That lock keeps the charging case securely closed, so it won't pop open when it's bouncing around in a bag or clipped to a strap. If you've ever pulled a lid-open case out of a backpack, you know why that matters.
The materials are the other half of the story. Olytop describes it as military-grade, shockproof and durable, designed to absorb impacts and resist everyday wear and tear. That's the kind of construction that suits commuters, gym-goers and travelers who treat their gear roughly. The included carabiner means you can hang it off a bag instead of digging for it, and the 3-in-1 cleaner kit (flocking sponge, soft brush and metal pen tip, measuring roughly 3.95 inches long) is a genuinely useful add-on for keeping earbuds, keyboards and phone ports free of dust. You also get a spare adhesive tape, which suggests Olytop expects this case to stay on for the long haul.
Who should skip it? If you want something that disappears in your pocket, this isn't it. It's a hard, heavy-duty shell that adds bulk, it comes in black only, and it is explicitly not water resistant. And while it fits the QuietComfort Ultra Earbuds (2nd Gen 2025), Ultra (2023) and QuietComfort Earbuds II (2022), it is not a universal case. In my opinion, this is the pick for someone who prioritizes protection over slimness.
The FJIASTB case takes the opposite approach. It's a soft silicone cover in dark blue, and the material is described as skin-friendly, harmless, waterproof and shockproof. That combination is what makes it appealing for daily carry: silicone grips better than hard plastic, it absorbs minor bumps, and it won't scratch whatever it's rubbing against in your bag. The integrated design is the key detail here — the flip cover won't accidentally fall off, so you're not constantly reseating the shell after it slips loose.
Charging is where the FJIASTB case earns its keep. It's designed so you can charge the earbuds without disassembling the case, which sounds small until you've had to pry a stiff cover off every single night. The package includes the case, a carabiner and a lanyard, so you get two ways to attach it to a bag or keys. FJIASTB also states it provides 24-hour after-sales support, which is a reasonable safety net if something doesn't fit right.
The trade-offs are real, though. This case fits only the Bose QuietComfort Ultra Earbuds II (2nd Generation, 2025) — FJIASTB explicitly warns it isn't suitable for other models, so check your earbuds before buying. It comes in dark blue only. And because it's soft silicone rather than a hard shell, it won't offer the same rigid crush protection as the Olytop. If you drop your bag under something heavy, a soft cover flexes where a hard one resists. For everyday knocks, that's fine. For serious abuse, it's not.
• Best for maximum drop and crush protection → Olytop Bose QuietComfort. Military-grade hard material and a shockproof build designed to absorb impacts.
• Best for keeping the lid shut → Olytop Bose QuietComfort. The integrated lock clip prevents accidental openings; the FJIASTB relies on an integrated flip cover instead.
• Best for slim, light everyday carry → FJIASTB Case. Soft silicone and a slim-fit profile add far less bulk than a hard shell.
• Best for charging without removing the case → FJIASTB Case. It's specifically designed to charge without disassembly.
• Best for wet or humid conditions → FJIASTB Case. Its silicone is described as waterproof; the Olytop case is not water resistant.
• Best for extra accessories in the box → Olytop Bose QuietComfort. You get a carabiner, a spare adhesive tape and a 3-in-1 cleaner kit.
• Best for newer 2025 earbuds only → FJIASTB Case. It fits the QuietComfort Ultra Earbuds II (2nd Gen 2025) and nothing else.
• Best for older model coverage → Olytop Bose QuietComfort. It also fits the Ultra (2023) and QuietComfort Earbuds II (2022).
I'd buy the Olytop Bose QuietComfort. The locking mechanism and the hard, shockproof shell solve the two problems that actually damage earbuds — a lid that opens when it shouldn't and impact from a drop — and the included cleaner kit and carabiner make it a more complete package. The FJIASTB is the better choice if you want something slim, soft and waterproof that charges in place, and for many people that's genuinely enough. But if you're choosing one, I'd take the protection. Just check the current price on Amazon before you commit.
It depends on how you carry your earbuds. If they live loose in a bag or get clipped to a backpack, the Olytop's hard shell and lock clip give you protection a soft cover can't match. If they mostly sit in a pocket, the FJIASTB's slim silicone is lighter and easier to live with.
Does the FJIASTB case fit the Bose QuietComfort Ultra Earbuds (2023)?
With the FJIASTB, yes — it's designed to charge without disassembly. The Olytop uses a two-piece design that allows flexible opening, but it isn't marketed as a charge-in-case cover, so expect to handle it when you plug in.
The FJIASTB. Its silicone is described as waterproof and shockproof, and silicone handles sweat and moisture better than the Olytop's hard shell, which is not water resistant. For pure impact protection, though, the Olytop is the tougher of the two.
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