Saucony - Kalenjin Spike (Silver/Carolina) - Women's: A spike developed specifically to meet the needs of cross country athletes. Compression molded EVA midsole provides comfort and cushioning. Non-Visible HRC (High Rebound Compound) in the heel. HRC is a responsive EVA/rubber compound which provides cushioning through the later stages of the gait cycle. Molded Spike Receptacles for outdoor use. XT-600 Carbon Rubber outsole offers outstanding abrasion and traction properties. Shoe weighs 7.7 oz.