These doors are made of PVC profile with light metal reinforcement inside, which makes the structure rigid. Glazing is a classic double-glazed unit, which can be replaced with plastic in the interior doors. The profile can be easily tinted in any color. Separately, I want to note that if you buy uPVC Doors https://prestigeplus.sydney/upvc-doors/ from PrestigePlus, then you get doors that are durable, retain heat well, are resistant to moisture, and have excellent sound insulation.