Which knapsack

[Boomerang]

Got a cooper regular cp15 evolution, couple years old , just srung a leak in the seam, wet back,.
So any recommendations for alternatives, or have I been unlucky with cooper peg

 

[spark plug]

Berthound Vermorel 1800, is what I’ve gone to. Very good so far, the Cooper stuff has gone back in recent years, much more comfortable too.