You asked for the ultimate high-traction slip-on shoe, so we built it. The HyperGrip™ rubber sole provides the best traction available, wet or dry. Mid-cut upper protects your foot and ankle both in and out of your boat. MicroMesh™ allows water to drain, while keeping sand and grit out. Two sets of interchangeable insoles allow you to customize the cushioning of the shoe to hike and portage comfortably over any terrain. From put-in to take-out, NRS Attack Shoes will take you anywhere. Marking sole. (Whole sizes only) Women order one size smaller. 1/2 sizes order one size larger. These shoes are running snug - If you are in between sizes or have wide feet you may want to consider the next size larger.