A Fly-Fishing Favorite Steps Out Of The River. Named for a Western native trout, these boots bring the look of Danner's iconic River Gripper to city streets. The fly-fishing-inspired boots have a GORE-TEX liner for waterproof protection. Long days on your feet feel a little bit shorter thanks to the comfortable, slip-resistant Danner Wedge outsole. Perforations allow for breathability when the weather takes a turn.