- Velcro straps and gold buckle - Size 8.5 - 1.75” Wedge - Beige/nude Vionic Pacific Rio - Women's Adjustable Platform Sandal. The platform gets an upgrade with Pacific Rio, a beach-ready slide with three adjustable straps. A metal buckle detail brings both function and style to this classic silhouette, which adds just the right amount of height. Natural Alignment with Vionic's Biomechanical Footbed. The orthotic grade footbed supports your feet from the ground up.