Sealed Air Instapak Quick RT, #20 Bag for 10"x10"x10" Box, Easy to Use, The ultimate protection for fragile shipments, Foam Packaging Bags (Pack of 36) (IQHRT00-20)

This stuff is incredible, took a few tried to figure out exactly how to line the bag up in the PC I was shipping for max support, but once I did, it was perfect. Made it all the way to the Bay Area with nothing dislodged.

This works and expands, but you don't always get 18" x 18" coverage. Occasionally one may not expand since the instructions are explicit and if they aren't followed to the letter, composite A & composite B won't mix properly, thus you get NOTHING.

We use it to protect delicate electronic parts for shipping and it works great.

They do not expand as high as the spec says, but overall a great product, just buy the size bigger then you think you need.

Perfect.

For the reviews that say they don't full out have to be doing something wrong. We used them in required box size and secured product perfectly. I would definity purchase again.