The sound would constantly go out and the only way to fix the sound was to mess with the wire and get it to sit right. Although these airpods are refurbished, youd never know! If you look at my photo you’ll see my heel is at the very end, almost falling off. Immediately bought some more! The sandals are lightweight. I have to unplug the headphones and untwist the cable or the twisted cable annoys me to no end. Rails appear well made and great for my purpose in mounting bikes, skis or extra luggage rack. The rails, or more specifically, the holes in them:So there are total of 6 holes in these things: two on each side to hold the side the top brackets on, for a total of four, and one on each side, which just goes straight through to secure the bottom bracket. The end piece are just heavy duty plastic. I had gotten these for my husband since he had been wanting some wireless earbuds or a while but didn’t want to spend $100s on the Apple ones.