Ideal for mailrooms, home based businesses, and internet businesses looking for supreme product protection without investing in warming equipment. Ready-to-use and provides excellent protection for fragile items. Bags expand up to 27 times their original size. Activate at room temperature. Quick Tuff RT foam bags have denser foam and are perfect for protecting heavier products during transport. Four simple steps: 1. Apply pressure to the ÐPress HereÓ area to open the inside seal. 2. Pat parts (A) and (B) back and forth; bag will begin to expand. 3. Place the expanding foam-filled bag in the carton and nestle the product onto the cushion. 4. Follow steps one and two, and place second expanding bag on top of product to form top cushion.