Over leggings with flat boots
Over skinny jeans, scrunched into sneakers
Over leggings, pulled over the heel of flat rubber-soled shoes
All three looks are definitely on the casual-cool side. Stick with solids and chunky knits if you're unsure about how to wear your legwarmers. Experimentation is key, however, because there is no one-size-fits-all styling solution when it comes to this accessory.