The Oso Flaco Winged Edition Sandal encapsulates LUNA Sandals' mission to make getting outdoors feel a little more, well, natural. These zero-drop, zero-upper, minimalist sandals allow us to keep the bottoms of our feet protected while we hike, run, paddle and play. LUNA's soft materials keep our feet secure without irritation, and the high-traction Vibram sole and grippy footbed prevent slips that could cut our adventures short.