The black,red,grey etc. color sleeves are custom made to our spec and yes do utilize some natural rayon fiber.
Interconnect sleeves (varied patterns) also are custom made to our spec but with a poly blend (preferred for IC use, 32-carrier braid sleeve).
I want to apologize to all that are waiting on emails in the past few days as I have been unable to get replies out. However all emails should be replied to by this evening.
Further for those with pending orders that have been waiting a bit beyond original expected ship date your order will be shipping soon. Currently aiming to get
all orders out this week to those that have been waiting longest.