Studded 90 degree sole Oil & Acid resistant rubber with aggressive lugs & 90 degree right angle heel to outlast the harshest conditions. Features: Fit: Match the sole size with your OmniTrax 3.0 boot for a perfect fit. Traction: Includes 21 ultra-durable carbide studs per foot (42 total) for extra traction on icy surfaces. Oil & Acid resistant rubber with aggressive lugs 90 degree right angle heel to outlast the harshest conditions. Sole sizing information: Outdoor soles come in whole and half sizes for both Men and Women and must match the size of your Korkers winter boots to function properly (e.g. Men's Size 10 Boot = Men's Size 10 Sole). Half sizes, select the appropriately-marked sole (e.g. Men's 10.5 boot = Men's 10.5-11 sole). Boot sizing can be found on the inside tongue label or on the original Korkers boot box or sole box.