That’s when they told me about the break in period. I was not impressed with them, especially for the price. Id suggest searching a review on youtube, because the written description in manual doesnt get into every detail that lets you customize your listening preferences. Service. UPDATE: I wore these every day last summer and absolutely loved them. Otherwise, the winch would have just been mounted to marine grade plywood and I wasnt sure the deck would hold up to the repeated stress. Im 56 175lbs all belly. just letting you know! They came in 1 day after ordering! Im already having fun training myself in the quickest ways to put em on.