which size ortlieb bag fit in a sabre 45 best ?

[PC2K]

i'm trying to find a waterproof bag for the main compartment of my sabre 45, which ortlieb bag fit in the sabre the best ? Waterproof bags are always wrongly shaped for a bagpack and the size's they make are never the same as a packpacks...

i have tried contracters garbage bags, but i can't seem to get a good waterproof closure.

[Adi007]

Here's a good one: WXtex (http://www.rei.com/online/store/ProductDisplay?storeId=8000&catalogId=40000008000&productId=47777913&parent_category_rn=4500447&)

[PC2K]

that sure looks nice, but not really avaible to me. The brands i can find locally are ortlieb, sealline and aquaquest. So anybody having experians with one of these drybags and the sabre 45 ?

[Adi007]

Ortlieb 65 would do but it's huge and heavy in comparison.

[Martyn]

I use the 35L Ortlieb PD 350 in mine and find it fits well.