Sturdy and near bulletproof. The only reason I didnt completely lose my bikes was some kind passerbyes waved me down. It was a bit large but if feels nice on the feet. The connection with iphone is as quick as airpods. Great quality good sound and microphone on a call other hear you greatly Bust is a 36 C. I learned my lesson from older sets of headphones that are now peeling from age. If you have a spare tire it doesnt get much easier than this. Very satisfied overallUpdate: dont buy these earbuds if you care about using them to make calls - the microphone quality is bad. The directions and template on the box were clear.