By The Numbers- How Much Wind Penetrates Your Air Permeable Outer Layer at Hiking and Running Speeds
Stephen Seeber helps us answer the question, "do air-permeable garments allow a noticeable amount of ventilation while hiking or running?"
Andrew and Ryan chat with Backpacking Light contributor Stephen Seeber about layering and waterproof-breathable fabrics.
What is MVTR's role in active insulation garments?
Air permeability vs. moisture vapor transmission rate (MVTR): which one impacts moisture transport more in wind and rain jackets?
This study compares the performance of four jackets made with fabrics that span a wide range of air permeability rates and moisture vapor transmission rates (MVTR). The study shows that significantly greater moisture removal can be achieved as a function of jacket MVTR than jacket air permeability.
The Helly Hansen Odin Minimalist 2.0 jacket (180 g / 6.35 oz, $220) is a lightweight 2.5-layer rain jacket with a well-designed hood and minimal features.
In this installment of Standards Watch, Rex interviews testing and standards development expert Steve Seeber.