Under Armour Mens Assert Running Shoe Black and Red UA Footsleeve Fit System - Wraps the midfoot with a secure, athletic feel that keeps you quick, comfortable, and locked in. ArmourBound/ArmourLastic Composite Cushioning Compound - This low profile composition provides maximum comfort that works with the natural efficiency of every foot-strike. Carbon Rubber - Covers the impact and abrasion zones of the outsole that are particularly susceptible to wear. Durable Outsole Foam - Covers areas of less tread to deliver full ground contact. Weight - 268 grams.