Butterfly Leggings, Blue Striped Yoga Pants, Bright Colorful High BUTTERFLY BLACK HEART SPORTY LEGGING SET GREEN BLACK Gold Butterfly Leggings Glow in the Dark and Gold Design Etsy Black and White Heart Leggings, Buttery Soft Smooth Full Length High. The Butterfly Black Heart Sporty Legging Set in green and black for girls is made from a comfortable cotton blend fabric. The set features a stylish butterfly and black heart design on the top, paired with matching leggings for a sporty, trendy look. Soft, breathable, and stretchy, it's perfect for active play and everyday wear.