-made of polyurethane foam covered with silver lined fabric. 

-anti microbial effect inhibit bacterial and fungal growth 

- eliminates 99.9% bacteria in less than one hour

-heat transfer - cooler in teh summer and warmer in the winter

-all natural safe and non toxic. contains no chemicals

- permanent - the effect of silver does not decrease over time. It remains for the lifte of the product

-  better immoblization - made of polyurethane

- plastic bushes for air circulation

- for minimal immobilization of the cervical region;