The New Cañon Ball Dual Aperture Bag is made out of 900D TPU (Thermoplastic Urethane). It allows you to access both ends of the rope easily and efficiently. 
-Add additional rope or pull cord, without having to pull out and re-stuff the entire rope. 
-Set up a top belay
-Plan for rescue
-Use the other end for a traverse or hand line
The bag has three panels of removable flotation and drains exceptionally well.
It is 20”x6”x9” making it 18L. The Cañon Ball is designed to hold 70-100M of any Glacier Black 8.5mm ropes