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Albert Graham, Backyard Pool Drainer
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External frame backpacks: are more comfortable to wear since your back gets air circulation; weigh a little less; and cost less.
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Rob Verdann, Afterdark Removalist
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Conventional external frame backpacks are both prone to leakage and are difficult to pack into a canoe with the frame side down.
Whenever lightning is nearby, take off backpacks with either external or internal metal frames.
Backpacks Which type: Internal or external frame?
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Dan Toomey, Computer Salesman
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Internal frame backpacks: keep the weight closer to the body and hence help provide better balance; have more internal volume than an external frame pack; have fewer places to snag; and cost about 50 to 100 percent more than an external.
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