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How to avoid a sweaty back and back sweat while wearing a backpack with airflow & ventilation - YouTube
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VentaPak Small Ventilation Backpack Spacer,Small Version Lightweight Rucksack Accessory Frame to Improve Airflow, Sweat Guard & Back Strain,Increase Comfort for Hiking, Biking, S, Small Ventapak : Amazon.co.uk: Sports & Outdoors
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