Women's Vionic Tide RX - Black metallic The natural leather that BIRKENSTOCK

The natural leather that BIRKENSTOCK uses is mostly smooth leather

This SAS Duo customer favorite is your go-to sandal

FOOTBED: Single-density open-cell PU foam

Waterproof nubuck leather uppers

Women's Vionic Tide RX - Black metallic The natural leather that BIRKENSTOCKDesigned to break the mold, engineered with Vionics advanced recovery system (VRX). This lightweight recovery sandal balances ultra cushioning, support and stability, and features a massaging footbed and dual density cushioning. Features Tested by Heeluxe: The footwear industry gold standard, Heeluxe uses patented technology to analyze comfort and performance against competitive styles, in conditions that duplicate real world wear. Backed by Heeluxe