NEW: U/S-shaped frame

UON and DUON U-Shaped Head and neck masks and Duon S-Shaped Head, neck and shoulders masks combine the unique features of U-Plast thermoplastic material with a newly designed U- and S-shaped frame that is stronger with an improved bending stiffness. This leads to a more sturdy mask.


NEW: T-shaped pins

New T-shaped pins in DUON increase user friendliness in that they are more easy to attach to and release from a base plate. The pins are available as a separate item so they can easily be replaced when necessary.


Antibacterial, non-stick coating

Each mask is treated with a unique water-based non-stick coating with antibacterial properties. The coating avoids sticking of the mask to skin, hair and hardware and its antibacterial properties (*) prevent cross-contamination in a hospital environment.

Leaflet Antibacterial Properties: Download PDF (931 kB)


Thermoplastic properties

UON and DUON masks offer a high and reliable quality with controlled low shrinkage. This results in high accuracy, high ease of use and increased patient throughput.

They become mouldable at 65°C – 70°C (149°F – 158°F) and can immediately be placed on the patient’s face after they are towel dried. The low molding temperature of these masks significantly increases patient comfort.



The new UON and DUON masks are compatible for use with virtually all base plate hardware. Orfit also offers a full range of carbon fibre laminate and high density plates and couch extensions for use with UON and DUON.


* show a reduction of >99,99% of Methicillin-Resistant Staphylococcus aureus (MRSA), Staphylococcus aureus, Escherichia colli (EC) and Vancomycin-Enterococci (VRE).


For all thermoplastic masks, go to High Precision immobilization Systems


Available Components for UON and DUON Systems:

UON base plate for head & neck
HP adapter for S-type base plates – medium density center plate
HP and DUON Integra head, neck and shoulder base plate
HP and DUON Integra head, neck and shoulder extension for Varian Exact™ couch
Base plate for DUON head only masks
Set of 6 low density head supports
Set of 6 regular density head supports
Prone head support – adjustable in size – movable head cushion
Prone head support – adjustable in size – movable chin cushion
Head support interface for U-shaped base plates – high density
Head support interface for S-shaped base plates – high density
Head support interface for S-shaped base plates – low density