Roller Screens (Flat Mesh): These function like a roller blind. When opened, the mesh rolls completely out of sight into a compact vertical side-cassette. They offer the most unobstructed "invisible" view, making them perfect for single entrance doors or standard awning/casement windows.
Pleated Screens (Accordion Style): These feature a durable, pleated mesh that folds away into the side. They operate without heavy spring tension, meaning they stop exactly where you let go of them—making them incredibly safe and easy to operate for toddlers and the elderly. They are highly recommended for large, wide openings like bi-fold or multi-stacker doors.