On a regular Super C that's white leather; if you zoom in on the sample photos on the Kickstarter you can see it's textured reddish material, which is the fire hose stuff.
(IIRC the regular Super C has a black leather wear patch on the bottom, but this seems to have a double layer of cotton duck like the Camper Longflap.)
Yes, I can confirm these are all leather free. Replaced with recycled fire hose and double cotton duck for the base. They'll come supplied with buckled straps for saddle attachment made from recycled fire hose, too.
On a regular Super C that's white leather; if you zoom in on the sample photos on the Kickstarter you can see it's textured reddish material, which is the fire hose stuff.
(IIRC the regular Super C has a black leather wear patch on the bottom, but this seems to have a double layer of cotton duck like the Camper Longflap.)