This Darren Criss photo contains
hip boot, thigh boot, jambes nues, collants, pantalons moulants, skintight, pantalon skintight, pantalon collant, collant, jambière, leging, revêtement de la jambe, legging, couvre-jambes, and revêtement de jambe.
There might also be
chaussant, le tuyau, bonneterie, and tuyau.