Allegro Legging XS - Black. Feminine style, comfort and performance: the Allegro legging is the perfect addition to your wardrobe. This classic full length legging is made of our signature Stretch RE-FLEX and weâve also added a waistband made of our Power-FLEX in classic black, giving you extra support for any activity. Whether youâre on the go or laying low, this durable legging goes the distance. Now includes an invisible