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Try it yourself go put a hook in a cup of saltwater and a cup of freshwater and see how long it takes to erode you might be waiting a long time Below is a great answer from Yahoo Answers that explains how long it takes for a fish hook to dissolve in a fishs stomach (in laymens terms)

On a 5wt, you'll feel it

But if youre looking for a minimalist daypack and dont want to drop a ton of cash, its a killer value

2+1 Ball Bearings and 1:1 Gear Ratio, One-way roller bearing engages drag in one direction, Strong All-aluminum construction, Large arbor design for smoo

Just eleven more to go

I was also looking for a material that was relatively cheap and available