The Field & Stream store at Polaris Fashion Place is closing Friday, adding to the challenges facing the Delaware County mall. The outdoors store, which opened in 2015, posted a sign this week saying Friday would be its last day. The sign directed shoppers to the chain's Easton store and to its sister store, Dick's Sporting Goods. Dick's Sporting Goods next door, which shares the former Great Indoors space with Field & Stream, is not impacted, according to workers at that store. Officials from Dick's Sporting Goods, which owns Field & Stream, did not respond to questions about the Polaris space.