The 80% flax cotton and 20% cotton blend that the Mesh Pro tank uses boasts a super long coil life of 2 weeks ensuring that you save the pennies where it counts so you can keep enjoying your favourite juices. Freemax Mesh Pro Replacement Coils for use with the Freemax Mesh Pro Subohm Tank. Kanthal Double Mesh - 0.2ohm Mesh 60w-90w with 80% Flax Cotton 20% Cotton Wicking Kanthal Triple Mesh - 0.15ohm Mesh 80w-110w with 80% Flax Cotton 20% Cotton Wicking SS316L Single Mesh - 0.12ohm Stainless Steel Mesh with 80% Flax Cotton 20% Cotton Wicking