FYI eVENT tents were discontinued (except for small bivy's) because the fabric does not pass fire retardancy law.
In 2004 GE acquired BHA Technologies,( the makers of eVent), and promptly put a 70cm /27.5" height limit to shelters made with that fabric.
In the meantime , RAB,Exped and Integral Design already had made and marketed shelters made with that material.
RAB and Exped still do, albeit using a different name for the same fabric, Integral Design I believe still does (trilaminate ePTFE) for the the military/government market.
(I had typed this yesterday, than changed my mind but following some of the other comments decided to post it)
There are several types of fabric that are not fire retardant and therefore cannot be sold in some states however they are sold retail where restrictions do not apply.