Ethically sourced leather upper Recycled stretch neoprene backing Partial side zipper for easy on-and-off Synthetic Biolife lining, created using a method that replaces the use of harsh chemicals with recycled materials Ecological foam sock to provide added comfort; made by using renewable energy from byproducts from the food industry such as soy and sugar cane. TR outsole that includes the use of partially recycled materials Approx. 20.8" shaft height Approx. 14.1" shaft circumference Approx. 0.9" platform height Approx. 2.9" heel height