Best IWC Big Pilot Strap Choices: Leather, Suede, or Calf? Learn how leather, suede, and calfskin compare when choosing an IWC Big Pilot strap. Compare comfort, texture, and everyday wear to find a suitable replacement for your watch. Shop quality options at a trusted watch band & straps store. https://www.smallbizamerica.org/articles/best-iwc-big-pilot-strap-choices-leather-suede-or-calf