KB3D Nexus Mask (FMJ-08)

The FMJ-08 gas mask is a full-face mask that takes clear visual inspiration from the classic S10 profile, while updating the design for the modern day.

Unlike traditional smooth rubber head harnesses found on masks like the S10, the FMJ-08 features grooved straps. This design improves grip and durability, making the harness more resistant to silicone-based lubricants.

Developed in the KB3D lab, the Nexus is The Modular Gas Mask System. Built around a universal interface—dubbed The Insert—each module screws securely into the mask’s insert, allowing the function to be changed as required.

This Nexus mask has The Insert installed and includes the Standard module. The Standard module is a key component, restoring the mask to its original configuration when no other attachments are in use. This module includes an integrated valve that recreates the correct airflow and allows the original front cap of the mask to be reattached.

All other Nexus modules are not included and needs to be purchases separately.

This is a one-size mask. The straps are adjustable to accommodate different head sizes.

Disclaimer: All products are sold as novelty items only. Use responsibly and at your own risk. Misuse can be dangerous. Any included safety features are supportive only and do not replace proper precautions, supervision, or established safe practices. We accept no responsibility for any injury, harm, or misuse arising from the use of these products.