Made from Grivory, the latest in fiberglass reinforced plastic, and stronger than even the super tough ZytelÂ®. UV and heat stabilized, making it impervious to the elements. The handle material is deeply checkered KratonÂ®, that has been molded directly to the blade tang. This knife is light enough to be tied, tucked, or taped just about anywhere on one"s person. And, since they are a natural to hide both inside and outside your house.