If your using any sort of substrate in your Zoo Med ReptiBreeze then you should consider using one of these removable pre-formed substrate trays.
Individual removable/washable trays that hold substrate for the ReptiBreeze enclosures. Available in multiple sizes. Small (38x38cm) is compatible with NT-10, NT-11 and NT-15; Medium (45x45cm) is compatible with NT-12 and Large (60x60cm) is compatible with NT-13 and NT-17.