Very thin plastic, no wrinkling. When they say "flat" they mean it's meant to hold a bookmark. Read the description carefully before ordering to get the right bags. They don't fit the item I was trying to wrap, even if it's less than 3 inches wide. It just doesn't fit because these pockets are so flat. This is an ultra thin transparent cellophane sleeve with closed sides and one end. Literally made for a flat bookmark, pen or something with almost no thickness.
ClearBags Resealable Clear Cello Bags
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π Set of 3 Jumbo Christmas Gift Bags 36x44 inches - Reusable Durable Fabric with Ribbon & Gift Tag - Ideal for Oversized Toys & Holiday Wrapping - by Gift Boutique
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π Hallmark 15 Inch Extra Large Birthday Gift Bag with Tissue Paper (Happy B-Day, Black and Silver)
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