In-ear headphones from Bowers & Wilkins that both fit well and have good sound isolation. No matter what you're using them for, we're sure you'll find them to your satisfaction.
From Amazon
Bowers & Wilkins PI5 S2 Wireless True Wireless Noise Cancelling Headphones with Bluetooth, aptX, Active Noise Cancelling (ANC) and Built-in Microphones - Sage Green
John Lewis & Partners
Bowers & Wilkins Pi5 S2 Noise Cancelling True Wireless In-Ear Headphones with Mic/Remote
Selfridges
Bowers & Wilkins Sage Green Pi5 S2 In Ear True Wireless Earbuds