The TOMBOGO™ x Saucony Butterfly collaboration by designer Tommy Bogo is a brand-new silhouette that combines functionality with performance. The multi-functional shoe includes a modular inner boot that can be removed from the outer clog shell. The modular design enables self expression with an interchangeable system which allows the user to choose how they wear the shoe. FEATURES & BENEFITS PWRRUN cushioning Premium air mesh Co-branded logo Gradient sockliner Iced outsole pods True to size. Half sizes suggested to size up Unisex sizing runs as men's sizing