Under Armour Micro G Pulse - Boys' Preschool The Under Armour Micro G Pulse running shoe offers a soft step for the serious runner. Seamless upper provides a smooth, secure fit while increasing airflow, keeping your feet cool, dry, and comfortable. The full-length Micro G midsole lightens and responds to your step, allowing you to reach unforeseen speeds. Full-length 4D FoamŪ sockliner forms to your foot's unique shape, eliminating heel or forefoot slippage. Rubber outsole offers vicious grip and lasting durability.