They were kind of pricey for only being able to use one earbud The set includes a workout sheet with many exercises with the various attachments. Its not durable. I love Chacos. Ordered an 8 and they are just fine just a touch long but not bad. Its muffled too. AUTHENTICITYIll just start out with this because I know its the biggest concern when buying something as expensive as this on Amazon, plus its refurbished. Bought for my brother to use for a family getaway 3-4hrs drive. They mention "suede" in title. Wore them on a day trip to a creek and hiking through a lava cave and up and down stairs.