1.5" heel made of recycled plastic Cushioned foam mid-sole for all-day under-foot comfort Genuine calf hair upper, leather lining, and synthetic rubber sole Interchangeable boot can also be worn with Twiggy or Tilda straps (sold separately) Junko strap can be worn with any Alterre Chelsea Boot Available in regular full sizes 6 - 10. Half size? We suggest sizing up.