So anyway, they are self sustaining tactical mobility boots, meaning they have a rechargeable boost activated by jumping hard enough. No they aren't hers at all, They're military issue; she.. skillfully acquired them. Wouldn't be too hard to find as she's kind of being hunted by the military(shes not a top priority target though), It was harder to find a pair in her size.
Not being hers, along with her built in strength, means she's still getting used to them. Why did she want to risk it to get them in the first place? Mobility to get away basically.
