Traction: 10 replaceable push through steel spikes Durability: The BOA components are guaranteed for life and the cleat system is backed by Korkers Rock Solid Guarantee. Rest assured, this product is made to last no matter where your next run may take you Fit: This is form-fitting freedom. A revolutionary new on demand traction system that’s lightweight, durable, and easy to use. Featuring a versatile Boa Fit system that wraps your foot from all directions, to create a fluid, dynamic fit that’s quickly adjusted on the fly and won’t budge when put to the test. The Ice Walker model is designed to fit most standard sized shoes. If you sense they're bulky, size up Weight: 8oz per pair The Ice Walker model is designed to fit most standard sized shoes. If you sense they're bulky, size up Sport type: walking