Under Armour Marbella III Women's Flip Flops Synthetic-and-mesh Synthetic Performance Strap - Secures the foot in place and sits comfortably against the skin. Dual-Layer 4D Foam Footbed - Conforms to the contours of the individual's foot. Anatomical Footbed Design - Cradles the foot for enhanced comfort and a secure lockdown. Sculpted EVA Outsole - Attenuates impact shockwaves whilst also allowing the wearer to gain an effective purchase on a range of surfaces.