Orange Fire Retardant Vinyl Tarps - 18 oz Size:40' x 60' Does the tighter weave affect

Does the tighter weave affect airflow

Weight: 72 lbs

Finished size: 20′ x 27′ x 6′

lightweight vinyl roll

Orange Fire Retardant Vinyl Tarps - 18 oz Size:40' x 60' Does the tighter weave affectMaterial: 100% PVC Coated over Polyester Scrim Fabric Weight: 18 oz. Per Square Yard Thickness: 20 Mils Finish: UV Resistant, Mildew, Tear, and Abrasion Resistant, Fire Resistant (NFPA 701, ASTME E 84 and approved by California State Fire Marshal),Waterproof and Heat Sealed Seams Flame Specs: Meets NFPA 701 and California State Fire Marshal F 121. 2 requirements Size: The actual size is the same as the finished size (+ ) 1 2 tolerance Grommets: Rust