I bought the matching hat and booties for my son.  We use them mostly at night to keep his feet warm when he's not wearing pj's with footies.  Initially he would try to pull them off but there are two button 'settings' so you can make them fairly snug and now he leaves them on 'til the morning.  We occasionally put them on inside the house but my only comment is that they would be better having the non-slip grip on the bottom when made for this age range, as this is when they are walking/running and slipping/falling- which he has done on occasion with them on!  Because of that, we probably don't use them as much as we could, and in retrospect, I'd have bought them for a younger child.  Otherwise, still a good purchase.