Patagonia Advocate Skimmer Synthetic Durable, soft microfiber upper with added gore elastic easy fit; perforated vamp area breathes Rear pull loop provides easy on and off; clips to pack 3mm 20% Recycled EVA anatomical footbed provides cushioning, comfort and support 2mm 15% recycled EVA insole provides extra cushioning 3mm 20% recycled durable rubber armadillo-patterned rubber sole provides grip, traction and protection