The PUMA x COLLINA STRADA Mostro is the latest boundary-pushing shoe from PUMA's collab with the NYC-based fashion label. The Mostro’s low-profile silhouette and infamous spiked sole is loaded with hidden details, made from mixed textures, and topped off with an oversized flower tongue flap featuring the co-branded collab logo. These shoes come with two sets of interchangeable tongue flaps are flowery inside and out thanks to the use of recycled and vegan-certified materials.