Sanuk Flip Flops - Sanuk Yoga Mat Flip Flops - Watermelon :: Women > Flip Flops. Synthetic leather upper is extremely comfortable to wearWomen's flip-flopsMade from yoga matsMaterials: Upper: Synthetic. Lining: Jersey. Outsole: SyntheticTread gives good grip on natural and artificial surfacesStraps is supportive and durableJersey liner is soft next to the skin Size: UK 03,UK 04.