They are flexible and allow my foot to freely bend. My only wish would be for these to have a bass and treble control. I had two problems with this microphone. all on line at the mercy of glowing advertising and photos. Love that I can charge everything on one charger! the setting is unique and adds to the overall atmosphere of the film can feel very claustrophobic at times with nice tight camera pans. I wear M-L so ordered a large and it?s perfect. My 6 year old tested them out by video calling a friend and it seemed the sound and mic worked great. After I view same music video with same volume level with all three different Tozo earbuds, NC7 sound quality is way better than others. The carabiner is nice and sturdy enough but because of how my purse is designed, I cant really attach it so it just gets thrown in my purse higgledy-piggledy.