Aftershokz Trekz Titanium Bone Conduction Bluetooth Headphones $140.84 Delivered ($136.53 after CR)
These bone-conduction headphones let you listen to music or podcasts without blocking your ears, giving you situational awareness which would be useful when doing activities like cycling.
Looks like the cheapest price around. They're US$129.95 on Amazon, who don't ship it here. They get 4.3 stars from 648 reviews on Amazon.
They're the newer titanium model, not the older Bluez 2 model.
Don't forget Cashrewards!