Compression-resistant foam in high-impact zones retains its shape after repeated compression cycles, good running shoes for knees.

Kids can assert their right to run in breathable, lightweight shoes that also support their growing feet when they wear the Under Armour Micro G Assert IV Running Sneakers. The bulk of traditional cushioning is tossed aside in favor of lightweight Micro G foam, for a plush, yet featherlight feel underfoot. Synthetic upper; Rubber sole Imported Under armour little girls' running sneakers Micro G foam cushioning 4D foam sockliner Style no. 1242016 Kids' athletic footwear from Finish Line

The midsole provides a soft landing zone while maintaining responsiveness for toe-off, best way to tie your running shoes.