The exterior has soft, leather straps while the lower part is a durable looking rubber with pretty aggressive traction on the bottom. I wasn?t expecting much, I had just seen the title in a book shop in the airport as I was waiting for a flight. Good material that holds up well and washes off. I wouldn?t hate on it but it feels so good and the quality is good. A parità di impostazione del volume della radio non ho bisogno di alzare al massimo il volume delle cuffie, posizionato su uno degli auricolari, lasciando quindi una "riserva" di volume per eventuali necessità. Diese Aussage halte ich für mehr als grenzwertig, denn bereits bei unseren beiden E-MTBs mit 27,5+"-Bereifung paßt die Aufnahmebreite der Tragschiene nicht, um die Reifenvollständig in der Schiene aufzunehmen. -The strapping that goes over your feet is not stiff or rough so it doesnt dig into your foot causing skin loss or blistering. When I adjust either the top strap or the rear (heel) strap to a barely snug fit, the strap sticks out from the shoe about an inch or more. I have used it for full body workouts. The best body was for sensitive skin.