It is made of high-density plastic materials, simple to use, lightweight and easy to clean, waterproof plastic coating makes it easy to prevent bacterial growth within components. It is composed of two plastic-coated, closed-cell foam head supports, a universal attachment base and two durable head straps. Base plate fits all aluminum and plastic backboards.Large ear holes for monitoring the patient. Minimal interference with X-ray, MRI, or CT procedures.Will not absorb blood or bodily fluids 
Adult and children
Technical Specifications:
Model  | Open Size     (L×W×H)  | Folded Size    (L×W×H)  | Self Weight  | Load Limit  | Packing  | 
Qty  | Size(L×W×H)  | G.W.  | 
EM-H-Adult  | 40*26*17cm  | _  | 0.9kg  | -  | 8  | 570x450x570  | 10kg  | 
EM-H-Children  | 34*26*14cm  | 
  | 0.6kg  | 
  | 10  | 560*395*660  | 7.75kg  |