Under Armour Micro G Ignite Running Shoes ArmourBound Midsole - Delivers low profile, maximum, full-length cushioning and maintains an even distribution of impact with every stride. Micro G Foam Heel - This ultra-lightweight insert reduces impact. Full-Length 4D Foam Sockliner - Conforms to your foot for a customised fit. Formfitting, Breathable Mesh Upper - Delivers super-lightweight performance. Carbon Rubber - Covers the impact and abrasion zones for long-lasting wear.