Light and flexible is the name of the game here. A lot of mesh for breathability and Charged Cushioning to help protect against impact. Just put them on and run for miles.

Performance mesh upper for lightweight breathability
Foam padding placed around your ankle collar & under the tongue for an incredibly comfortable fit & feel
Deluxe foam sockliner molds to your foot for added underfoot comfort
Charged Cushioning midsole uses compression molded foam for ultimate responsiveness & durability
Durable outsole pattern for flex & traction
3025847-101 Under Armour UA Womens Charged Pursuit 3 VM Trainers - White