Shaka Packs are made to order. Current build time, 4-6 weeks.
Tube packs can be made to bolt on or strap directly to the top tube.
Exterior shell: X-Pac waterproof fabric & Cordura 1000d fabric.
Internal liner: Waterproof nylon.
Have a closer look at materials here.
NOTE: consider adding helicopter tape or similar under all mounting areas to protect paint.