Photo 1 of VentaPak Lightweight Ventilation Backpack Spacer - Smaller Support Ventilation Frame for Hiking & Biking Backpacks S - M Size Airflow & Reduced Sweat Marks

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Photo 1 of VentaPak Lightweight Ventilation Backpack Spacer - Smaller Support Ventilation Frame for Hiking & Biking Backpacks S - M Size Airflow & Reduced Sweat MarksPhoto 2 of VentaPak Lightweight Ventilation Backpack Spacer - Smaller Support Ventilation Frame for Hiking & Biking Backpacks S - M Size Airflow & Reduced Sweat Marks