These headphones work well and fit my ears well. It was a bit of an issue connecting to my device, but I think it was more user error than a headphone issue. In any case, once connected, they connected quickly every time I took them out of the case. The sound quality is pretty good - not the best I've found, but better than average, and the noise-cancellation works well. Playback also pauses if you remove one of the earbuds, which is a neat feature that I really wish I could see more of. I haven't actually tested the waterproof claim and unless they accidentally get wet I won't, but given their performance I have no reason to believe that claim is wrong. Overall these are better than average headphones and I would recommend them.
Headphones Sennheiser CX 300-II, black
318 Review
Upgrade Your Music Experience with XiaoMi True Wireless Earphones 2 Basic - Longer Battery Life and Superior Sound Quality (White, International Edition)
341 Review
π§ HUAWEI Freebuds 4i: Wireless Earbuds with Active Noise Cancelling & 10H Battery Life in Black
279 Review
Upgrade Your Audio Experience with Samsung Galaxy Buds+ Plus: True Wireless Earbuds with Improved Battery and Call Quality in White, including Wireless Charging Case and Velvet Pouch.
320 Review
New White Marshall Minor II In-Ear Bluetooth Headphone
101 Review
Massdrop x Koss Porta Pro X On-Ear Headphones: π§ Noise-Cancelling Mic, Voice Assistant, Track Skip | Collapsible Midnight Blue
314 Review
Sony MDR-ZX310AP ZX Series Blue Wired On Ear Headphones with Mic: Immersive Sound Experience
48 Review
Bose QuietComfort 25 Acoustic Noise Cancelling Headphones with 3.5mm Wired Connection for Apple Devices - Black
43 Review