Keeping temperature down by making ears breathe air is, in my opinion, is the most important, yet not well appreciated, reason why you need open headphones for extended use. I cant believe the current price. The narrower grip is competition legal and feels amazing in the hand. We should be receiving a 100% discount. I also use navigation when walking frequently. It?s an intense work out and as a former amateur boxer, it will teach you how to properly throw the 4 essential punch?s in boxing! I then returned them and re-ordered them in a size 10, but unfortunately, when they came they were still SO big on my feet! It doesnt really clean, only freshens which it does very well. Will hold 5-45lb rubber coated hex dumbells in 5lb increments. We tend to go overboard, even before Christmas.