Silicon streaking cap. For customer comfort we advise: the hook is used at an angle of 45 degrees to pull through hair, ant NOT at 90 degrees. It is NOT advisable to pull hair through EVERY hole in the cap, as this will make it difficult to remove. The 1800 holes are provided, to allow the stylist maximum flexibility. It is advisable to process under Moderate heat only. Cap has been powdered during manufacture. It is recommended that it is re-powdered after every 6 uses to facilitate easier fitting. To re-powder: Turn cap inside-out. Sprinkle small quantity of Baby Powder onto a dry towel or pad. Apply powder evenly to inside of cap. Rub into surface until powder becomes invisible. This should take about 2 minutes.