Cheryl, I don't know the answer to that question. I use bubble-wrap when shipping out my plants. It is absolutely nothing like the solar blanket material I used to wrap the GH's. 16 mil is so thick it resembles nothing commonly seen - not garbage bags (1 mil), not contractor bags (3 mil), not compactor bags (4 mil), not typical bubble-wrap (1 mil). Just imagine the difference in weight between this solar material and ordinary bubble-wrap. I don't use those clips and don't really have a clue what they are or how they work.
