Mycelium? I'm new don't beat me up if this is just some kind of webbing. I've found wood blewits near this area : r/mycology
Rhino USA 1-in x 10-ft Ratcheting Strap Tie Down 4-Pack 403-lb at Lowes.com
Cane Rattan Material Natural Rattan Webbing for Christmas Candy Cane - China Rattan Material, Rattan Webbing Suppliers | Made-in-China.com
Black Two Inch Nylon Webbing | JOANN
Cane Webbing 1/2'' Fine Open Mesh 18''X18'' | JOANN
2 in. x 16 ft. E-track Tie Down Strap
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1.5” wide Handle Webbing (Sold by 1 yard) – Knot and Thread Design
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