One of each of these:

https://www.amazon.com/gp/product/B06Y2YYS2L/ref=oh_aui_deta... https://www.amazon.com/gp/product/B00AWIPITS/ref=oh_aui_deta...

They work just fine at the gym, at home, and at work but when in a crowded public space the cutting in/out is consistent.