http://www.helium.com/knowledge/215768-why-wearing-layers-is-essential-when-backpacing.xml Helium.com > Hiking & Backpacking > Why wearing layers is essential when backpacing en-us Copyright Helium.com Tue, 17 Feb 2009 20:26:32 GMT Tue, 17 Feb 2009 20:26:32 GMT