what does that mean?

Athleisure 
noun [U] /æθˈleʒ.ər/
A style of clothing that is comfortable + suitable for doing exercise, but also fashionable + attractive enough to wear for everyday activities.
A hybrid of workout clothes + loungewear.

High-Waisted
Depending on the length of your torso, high-waisted leggings or shorts sit above your belly button and generally fit in your natural waist.

High-Rise
Depending on the length of your torso, high-rise leggings or shorts will will come up anywhere from just below to right in line with the belly button.

Moisture Wicking
Moisture-wicking fabrics are fabrics with the ability to pull moisture away from the skin using tiny, built-in capillaries. Moisture or sweat is drawn to the exterior through tiny spaces within a fabric for easy evaporation and rapid drying.

Low Impact Activities:
Stretching, Walking, Hiking, Yoga etc.

Medium-to-High Impact Activities:
Barre, Running, Gym Fitness + Weight Training, Dancing, Cardio etc.