The Enco Free series are the more affordable of OPPO's TWS earbuds; nevertheless, the latest generation boasts active noise cancellation (ANC) for just under US$100. They also feature an IP54 ingress-protection, up to 30 hours of the future and input from the OEM's high-end audio partner Dynaudio.
https://www.notebookcheck.net/OPPO-s-latest-Enco-Free2-TWS-earbuds-with-Dynaudio-tuning-and-ANC.541448.0.html