Vapefly presents the Firebolt Cotton, a natural cotton solution for easily wicking 3mm pre-built coils. The cotton is made entirely of 100% organic Japanese cotton and is free of harmful chemicals. The convenient agleted section is manufactured without acetone or glue. The Vapefly cotton is designed to fit 3mm in diameter, Vapefly Firebolt Cotton is perfect for rebuilding all of your favourite atomizers.