Rubber upper with a thermic fit. 4-way stretch bootie. 7mm of insulating neoprene rubber. Odor resistant and anti fungal removable insole. Internal TPU shank provides a stable foundation. Bogs Performance Outsole: all purpose traction that releases mud and crud. Temperature Rating: -40 degreesF. Imported. Measurements: Weight: 1 lb 10 oz Circumference: 14 in Shaft: 9 in Product measurements were taken using size 7, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.