From petermillar.com:

Description
The Flora features a mix of textured nylon panels and supple leather and suede accents in a uniquely stylish design. An ultrafine jersey lining and padded tongue provide all-day comfort.
Details
Upper: 52% leather / 48% nylon; Outsole: 100% rubber
Spot clean
Fit
We recommend ordering a half size larger than your normal U.S. size