Thanks for the advice tommikka, I know some come with anti fog lenses or thermal lenses? Are they very effective? As when I start I'll be playing a lot of woodland games, so they'll be exposed to the colder temperatures which in my mind makes fogging up a lot more easier?
Thermal / anti fog coated lenses are effective
Natural air flow from venting and space around your face will minimise fogging
If not good enough or if just a very basic lens then treatments are available. These are best avoided until any pre-treatment has lost its effectiveness
There are situations where no treatment will prevent fogging, but the better your circumstances the better your view
If playing in the cold and wrapping warm you may restict airflow and sweat when active
If it's bad then the addition of fans will enhance airflow - there are paintball specific fans but are easily made and very effective when using small computer fans