Shadow conspiracy penumbra coulomb mid seat series 3this pivotal seat is the signature design seat of joris coulomb due to his unique style this seat will really stand out visually on any bike build made from a sturdy but lightweight plastic and covered in a highly durable and comfortable polyestercotton blend it will retain its stylish looks and structure for a long time due to its high wear characteristics featuresmaterial plasticcover polyestercotton microfibertype pivotalpadding