Stay comfortable and stylish with Under Armour's Slip-On Bathing Sliders. Made with a quick-drying synthetic upper and an anti-slip outsole, these sliders sandals are perfect for before and after swimming. The ultimate beachwear companion for your next vacation. Upper: Synthetic Outsole: Rubber. Please note that the box or label may state a US/Euro size which is different to the UK size. It is advised to try on footwear before returning.