These fun Leggings are made of 100% cotton. They have an elastic waist for comfort and easy fit. They coordinate great with the Doggies "Dog" Navy short sleeve t-shirt and with the solid red, navy and white colors. They also coordinate great with the red candy stripes as well as with the navy/white stripe and red/white stripe. They coordinate great with the red and navy fleece colors and the red and white velour colors.