This Alexis Ren photo contains
jambière, leging, revêtement de la jambe, legging, couvre-jambes, revêtement de jambe, pantleg, pantalon, collants, justaucorps, and léotards.
There might also be
chaussant, le tuyau, bonneterie, tuyau, jambes nues, collants, pantalons moulants, skintight, pantalon skintight, pantalon collant, and collant.