Shinza.com today announced the availability of a new ZeroShock Sleeve designed for Apple’s MacBook line of notebook computers. “The ZeroShock Notebook Sleeve is composed of a high-resistance polyurethane foam that provides superior protection against external impact force. This advanced material not only helps protect the hardware investment but also the even-more-valuable data contained within. Both cases for the MacBook and MacBook Pro are available now for US$32.95 and $34.95, respectively.