Flexsoles Boater Men's Lace-Up Air Mesh 2-Eye Boat Shoe mesh Supremely Cushioned Removable Insole is moisture absorbent and hand-washable to promote hygienic environment. Air Mesh cooling vents fabric promotes circulation and ensures that feet remain dry and less prone to painful friction. The inside surface of the shoe is lined with material and padded for Comfort Around the Foot. Padded tongue for Ultra Soft Comfort. Orthotic Friendly Design features removable footbed to accommodate arch supports and orthotic insoles.