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Q&A Why are backpacks mostly not made of waterproof material?

Many bicycle panniers are made of waterproof material. Backpacks are not, necessitating built-in or separate raincovers. Why don't backpacks use the material that waterproof panniers do? Unlike ...

5 answers  ·  posted 9y ago by gerrit‭  ·  last activity 6y ago by System‭

Question backpacks rain
#2: Attribution notice added by user avatar System‭ · 2020-04-17T21:37:44Z (over 4 years ago)
Source: https://outdoors.stackexchange.com/q/9706
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/
#1: Initial revision by user avatar gerrit‭ · 2020-04-17T21:37:44Z (over 4 years ago)
<p>Many bicycle panniers are made of waterproof material.  Backpacks are not, necessitating built-in or separate raincovers.  Why don't backpacks use the material that waterproof panniers do?  Unlike gear to be worn on the body, there's no need for backpacks to breathe.</p>