I bought these at the beginning of the summer with the hopes that they may be softer and a bit more supportive. I suppose those would be called industrial grade. The sensitive for the mic is trash it barely picked up my voice at all It toppled over at one point for me and I had to remove stuff. I keep a set of I feel like each size we buy fits perfect and for such a long time because of the softness and stretch! I ordered four Airhead dock lines to replace ones which had become weathered with age. Wonderful company had an issue with the strap and without prompting they replaced the product Have to periodically connect the pillbox, launch app, and check via app that firmware is up to date. The battery and buttons work very good.