http://www.BackpacksAdvice.com/BackpacksInfo/PatternsForBackpacks/index.php http://www.BackpacksAdvice.com/rss/PatternsForBackpacksTips.xml Patterns For Backpacks from Backpacks Advice Different backpack manufacturers use different types of fabric material according to concept designs and purpose. - G-30 Fabric is 75 percent lighter than other fabrics injected with silicone causing it to stretch under pressure instead of tearing or locking together. - G-70 Fabric is twice Wed, 30 Apr 2008 12:20:05 -0600 http://www.BackpacksAdvice.com/BackpacksTips/9.php http://www.BackpacksAdvice.com/BackpacksTips/9.php Everything here is © Backpacks Advice, Copyright 2006, All Rights Reserved Worldwide.