CLARKS Women's UN.Port 100% Leather Rubber sole Heel measures approximately 4" Platform measures approximately 3/4" Soft lambskin linings with minimal stitching helps prevent abrasion. Unique Air Circulation System features intake vents to allow cool, fresh air to enter and moist air to escape. Contoured leather footbed reduces foot friction and extra cushioning at heel provides added support. Injected EVA sole with Ultra Flex Grooves to help ease the walking motion. Strike pads absorb shock and add traction without weight.