Shaka Packs are made to order. Current build time, 4-6 weeks.
Access snacks and small items while riding. This bag is made to strap directly to top tube & strap to the seat post.
Exterior shell: Cordura 1000d & X-Pac waterproof fabrics.
Have a closer look at materials here.
NOTE: consider adding helicopter tape or similar under all mounting areas to protect paint.