Chitosan is a naturally occurring extracellular matrix (ECM) derived from crustacean shells. The chitosan powder can be solublized in acid and cast into a mold through freeze drying (lyophilization). Particulate mammalian forms of ECM can be combined with the soluable form of chitosan to form a hybrid material. Chitosan displays hemostatic and anti-bacterial properties in addition to being hypoallergenic.