It?s a 4 pack so you can share with a friend. I am sure that this will wear in over time and I am sure that I am just being petty right now, but it is a little bothersomeWould I buy this again. I purchased six of these and they all broke over the course of a few months. The buckle is tight enough that they stay in place just fine. I recommend these units. I found two different shoes that I thought might work. The new pair in size 8 arrived in a thinly padded plastic bag. All of these can be used with a phone and can answer calls, again not a feature I tested. No media controls. Melody proves her loyalty and trustworthiness with both family and friends.