13#ceramistpalace 7 u/ v: Q9 M+ e. _' _* s 8 F9 L% `7 `. a- y. q ) d' G, C0 W+ ~6 O9 k! xIt's two layers of greenhouse plastic that is inflated with air.
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/ V1 H' j7 i! S2 s5 MMy husband seals the plastic layers himself, then use a small fan to blow air between the two layers. The plastic can only be bought at Horticulture supply stores.