Birkenstock Boston Soft Footbed 'Suede Taupe' Nike Air Presto One noticeable difference is that

One noticeable difference is that a crinkled glossy patent leather upper replaces the leather found on the first two “Shattered Backboard” models

Red Nike Air branding provides the only pop of contrasting color

fitted with an interior foam wedge for lightweight cushioning

while the 3’s signature elephant print overlays reinforce the forefoot and heel

the quarter and part of the heel

Birkenstock Boston Soft Footbed 'Suede Taupe' Nike Air Presto One noticeable difference is thatThis Boston Footbed model by Birkenstock was inspired by nature and has a soft suede upper that surrounds the foot. It also includes a soft footbed with an extra integrated foam layer for cushioning. One strap with a metal pin buckle that may be adjusted is also featured on this product.