Sjooz found Crocs Womens Swiftwater Slip On Lightweight Flipflop Sandals UK Size 4 (EU 36.5) on Outdoor Look at the price of 21.49 GBP. The Crocs Women’s Swiftwater Slip-On Lightweight Flipflop Sandals are exclusively designed for women for a stable foundation around water. The USP of this pair is that it is extremely lightweight and fun to wear. The uppers are specially crafted to add more flexibility. The firm base provides improved traction on wet terrains., Lightweight., Flexible Uppers., Improved traction around water.