As a specialized carrier (large quantities, special equipment that goes, etc.) I like to listen to music while linking, lifting, walking, etc., but need to keep my ears blocked to be eye to hear the forklift or car moving nearby. It is also good to be able to answer incoming calls while keeping my hands free. Earplugs / headphones are just dangerous in these situations, and I don't like having anything in / on my ears when I sweat.
I recently bought two pairs of Bose Frames, I put clear prescription lenses in one and prescription sunglasses lenses in the other. Together with the Apple Watch, they are a great solution. They sound great (even though they lack bass), and it's easy to control them via Apple Watch.