Sony WI-SP510 has a classic in-ear design. They are also water proof and can handle both a rainy day and a sweaty workout.
From Amazon
Sony WI-SP510 In-ear Wireless Headphones, up to 15h Battery Life, IPX5 Water and Sweat Resistant, Secure Fit, Built-in Mic and Voice Assistant - White
Ecprof
WISP510WCE7 - WI-SP510 In-ear Wireless Headphones-15 hours battery lif