High Quality Elekta Leksell Gamma Knife Icon System Radiotherapy Mask. Compatible with Icon System: Designed to be compatible with Elekta Leksell Gamma Knife Icon System. Customizable Shape: Different shapes can be made optionally and repeatedly during molding. Non-Stick Surface Coating: Prevents material from sticking to patients' hair and skin. Reusable and Reshaped: Mask returns to original shape when reheated and can be reshaped many times. Safe Material: No toxic fumes released during activation, safe for patients and environment. Comfortable Molding: Molds at low temperature for patient comfort. Durable Structure: Special molecular structure prevents material from overstretching. Perforated Design: Features 22% and 42% perforation with available nose hole.