WSPDSTP Merrell Women's Speed Fusion Strap The all-new Merrell Speed Fusion Strap is the perfect sandal to take you from the trail to the latest lunch spot. The athletic fit and Vibram EcoStep underfoot deliver all the attributes you need for any hike from a sandal. The FloatPro foam and Lycra lining will keep your feet comfortable all day. The hook and loop closure system allows you to quickly adjust this hiking sandal to the contours of your feet.