Question:
What are HMX and Pre-Vent?

Answer:

HMX and Pre-Vent are both high performing waterproof and breathable fabrics developed by Browning.  Pre-Vent has been in our line for several years and performs very well.  For those who demand a higher level of water resistance and more breathability Browning developed HMX.  All products using HMX and Pre-Vent are fully taped and designed to keep you dry and comfortable.