She's a Trackstar Jogger

Jogger comes in two colors: Black and Pink
These are stretchy

60% Cotton 40% Spandex
Dry Clean or Wash on Gentle Cycle, hang to dry
Color may vary on different viewing devices

True to size
Rise: 12” Inseam: 29.5" - Measured on a Medium
Small 2-4
Medium 6-8
Large 10-12
XLarge 12-14

Model is 5'7 and wearing a small.