Marks & Spencer. Colour:Denim Mix. This fastens with buttons at the back. Pull on the floral leggings and your youngster is good to go. 2pc Cotton Rich Denim Top & Bottom Outfit (0-6 Yrs). Material comp: Top - 100% cotton (exclusive of trimmings) Leggings - 97% cotton, 3% elastane Headband - 97% cotton, 3% elastane.