Hi Shirley, welcome to the forum.
Try a search using the search term of “Sox”. That will give you some of the previous discussions on the topic you might find pertinent. 

Hi Shirley, if you are using plastic baggies, be sure to just barely cut the bottom corners off to let condensate drain out.  Otherwise the baggie will eventually fill with condensate and become too heavy to stay on the tree.  You will lose your apple before it’s even ripe.  Another problem I had, even here in Western Washington, was serious sunburn on the apples in bags. Neither of these things is a problem with cloth drawstring bags or with footies.