The Omni Swivel Gas Switch Block allows a diver to change between two separate air tanks without having to remove their full face mask. The knob turns a full 180 degrees ensuring that there is no accidental switching during the dive. The knob pointing to the first position signifies that the air source closest to the outlet is in use.
IST B400 3mm tall cut boots
I think these are the perfect boot! They are soooo comfortable & flexible and the rubber sole is thi ...