100% Synthetic Synthetic sole Athletically inspired for your on-the-go lifestyle Next generation literide foam insoles are super-soft, incredibly lightweight, and extraordinarily resilient Soft, flexible matlite uppers feel broken-in from day one Croslite foam outsoles provide durable, all-day support and comfort. Perfect for warm-ups, cool-downs and all around Town Literide: revolutionary. Sink-in softness. Innovative comfort