Nerd 2 Rail Systems Style:Interspiro Rail The effect is that the

The effect is that the temperature inside the mask drops

Designed specifically for post-dive and water-sport environments

Suitable for scuba diving and spearfishing

it leverages the best features found on other FFMs with unique features designed by OTS

Compact emergency ventilation mask

Nerd 2 Rail Systems Style:Interspiro Rail The effect is that theNerd 2 Rail Systems Interspiro Rail: Mounting rail for Interspiro full face masks. Compatible with NERD2 FF Mount kit and various other accessory mounts. OTS Guardian Rail: Mounting rail for OTS Guardian full face masks. Compatible with NERD2 FF Mount kit and various other accessory mounts.