If you want replacement foam tips for compatible wired earbuds and a more secure, noise-isolating seal, choose COMPLY 100; if you need tiny wireless earbuds designed for sleeping, choose SZHTFX Sleep Earbuds. For construction work, neither is a purpose-built jobsite headset: COMPLY 100 is only a set of ear tips, while SZHTFX is a Bluetooth sleep earbud.
My practical choice is COMPLY 100 only if your existing earphones are compatible and you want to improve their fit; choose SZHTFX for a self-contained wireless option, not as hearing protection.
If you want replacement foam tips for compatible wired earbuds and a more secure, noise-isolating seal, choose COMPLY 100; if you need tiny wireless earbuds designed for sleeping, choose SZHTFX Sleep Earbuds. For construction work, neither is a purpose-built jobsite headset: COMPLY 100 is only a set of ear tips, while SZHTFX is a Bluetooth sleep earbud.
My practical choice is COMPLY 100 only if your existing earphones are compatible and you want to improve their fit; choose SZHTFX for a self-contained wireless option, not as hearing protection.
• COMPLY 100: Memory foam conforms to the ear canal for a secure fit and noise isolation; trade-off: it is a set of replacement tips, not earbuds, and compatibility is limited to select models.
• SZHTFX Sleep Earbuds: Miniature Bluetooth earbuds designed with side sleeping in mind; trade-off: each charge provides 3–5 hours of use, and the product is not described as construction hearing protection.
• Choose COMPLY 100 if you already own compatible earphones and want foam tips that can help them stay put.
• Choose SZHTFX if you want small, wireless earbuds for sleep, music, or calls without a cable.
COMPLY 100 is a pack of three pairs of black memory foam replacement ear tips in large. The foam responds to body heat and molds to the ear canal, aiming to create a personalized fit. That design can appeal if standard tips feel uncomfortable, or if your earbuds tend to slip during commuting, workouts, and everyday listening.
The snug seal is also intended to reduce background distractions and help preserve bass and clarity at lower listening volumes. That’s a useful combination for someone who already has compatible earphones and wants a closer fit without replacing the whole set. For construction work, though, these tips are not a headset, and noise isolation should not be treated as jobsite hearing protection.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 6 min read · Independent comparison
SZHTFX Sleep Earbuds are miniature Bluetooth earbuds designed with side sleepers in mind. Each earbud weighs 2.1 grams, and the canal-style shape sits in the ear like an earplug. The design prioritizes a small, close-fitting form that is intended to reduce pressure when lying down, along with sound insulation for sleep, music, and calls.
The product describes noise suppression of up to 24 dB and Bluetooth 5 connectivity. Both earbuds have built-in main connectors, and they can connect to separate devices. After the first pairing, the earbuds are described as automatically reconnecting when removed for use. Those features make SZHTFX the more complete choice if you want standalone wireless earbuds rather than replacement parts.
Battery life calls for realistic expectations. The earbuds are described as providing 3–5 hours per charge, while the charging case can recharge them 3–5 times; the listing also states up to 30 hours of use. For overnight wear, the small size and low-battery beep suppression may be appealing, but the stated per-charge duration is still relevant. I would not choose them as a construction headset or assume that their noise suppression makes them protective equipment.
• Best for replacing worn or uncomfortable tips → COMPLY 100. It is specifically a replacement-tip set, with memory foam that conforms to the ear canal.
• Best for a complete wireless earbud setup → SZHTFX Sleep Earbuds. They use Bluetooth 5 and do not require a separate pair of earphones.
• Best for side-sleeping design → SZHTFX. The miniature, 2.1-gram-per-ear design is aimed at reducing the burden on the ear when lying down.
• Best for a secure fit on compatible existing earbuds → COMPLY 100. Its heat-activated foam is intended to grip the ear canal and help prevent slipping.
• Best for stated per-charge battery use → SZHTFX, with a caveat. It lists 3–5 hours per charge and additional recharging through the case; COMPLY 100 has no battery because it is not an electronic product.
• Best for a jobsite setup → Neither by itself. COMPLY 100 only fits select earphones, and SZHTFX is designed as a sleep earbud. Neither product’s stated details establish it as hearing protection for construction work.
• Best match for “low latency headphones for construction work” → Neither based on the listed details. No latency figure is provided, so I would not choose either on that basis.
• Best match for “in ear headphones for construction work” → It depends on what you already own, but neither is a clear jobsite pick. COMPLY 100 is only tips; SZHTFX is wireless but designed around sleep and everyday listening.
The distinction is bigger than foam versus silicone. COMPLY 100 changes how compatible earbuds fit; SZHTFX supplies the earbuds themselves. If you already have a suitable pair, replacement tips may be all you need. If you are starting from scratch and want Bluetooth, SZHTFX is the more self-contained option.
I’d choose COMPLY 100 if I already owned compatible earphones and wanted a snug foam fit; otherwise, SZHTFX is the more complete wireless product. For construction work, my recommendation is neither as a dedicated headset: the product details do not establish either as protective jobsite equipment. If I had to pick between these two for that setting, I’d choose COMPLY 100 only to improve the fit of compatible existing earphones—not as hearing protection.
No. COMPLY 100 is a set of memory foam replacement tips for select earphones. SZHTFX is a pair of Bluetooth earbuds with a charging case.
SZHTFX is the more directly sleep-focused option. Its miniature design and 2.1-gram weight per ear are intended to make it more comfortable when lying down, though the stated 3–5 hours per charge may matter for longer sleep sessions.
Neither is established as a construction headset or hearing protection.
Consider COMPLY 100 if your earphones are on its compatibility list. Its memory foam is designed to mold to the ear canal and help create a secure fit, but it will not work as a universal replacement tip.
• WUYUEGE Open Ear Clip vs DCMEKA DEMAKE comparison
• Cisco vs TOZO NC9: Hybrid ANC Earbuds
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.