Wear your new Chaco sandals for a few hours a day for one to two weeks to break them in. You're probably thinking, "I don't have that kind of time!" Wearing them all day for three to seven days will speed up the procedure. Just be sure to take them off when you go to bed so you don't get any blisters. If you want to really make your Chacos feel like home, wear them every day for several weeks. That way, they'll become more comfortable and fit better. Breaking in your Chacos is very important because it ensures a good fit and keeps down problems with blisters. Wear them everywhere - at work, at school, on vacation - even if it's just for a couple of hours. That's how long it takes to break them in. You should break in your Chacos by wearing them every day for a few hours. If you want to speed up the process, then you can wear them for three to seven days. If you want to make your Chacos feel more comfy right away, then wear them every day for several weeks. That way, they'll fit better and be more comfortable to walk in.