Personaly I'd rather have a pack made of material that will last a LONG LONG time than something like those dry packs that are more prone to ripping, sun hardening, etc.

I really like the maxpedition pack I have made of " 1000-Denier water and abrasion resistant light-weight ballistic nylon fabric. "
Full details:
◆ 1000-Denier water and abrasion resistant light-weight ballistic nylon fabric.
◆ TeflonŽ fabric protector for grime resistance and easy maintenance.
◆ High tensile strength composite nylon thread (stronger than ordinary industry standard nylon thread)
◆ #AS-100 high grade closed-cell foam padding material for superior shock protection.
◆ High tensile strength nylon webbing.
◆ YKK #10 high strength zippers and zipper tracks.
◆ UTX-Duraflex nylon buckles for low sound closures.
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