The 17.5 ounce Chugach Jacket is made with Toray’s Primeflex 3-layer Dermizax EV waterproof breathable, 4-way stretch fabric. DWR treated at the yarn level with Toray’s patented & industry leading Kudos DWR. The Chugach Jacket is designed with YKK zippered hand pockets set high to allow access with your Icon pack on, a YKK weatherproof full front zipper, YKK weatherproof pit-zips, an inside storage pocket and a well designed storm-hood. The Chugach storm-hood is designed to be cinched in two directions to keep peripheral vision open with and without a hat on.
The Chugach is a packable hardshell designed to shed the worst weather in the world. It is not a fuzzy, soft quiet fleece type fabric such as MTO50, however it is the softest and quietest hardshell I have tested and will not hold moisture.
Primeflex fabrics utilize a patented spiral yarn technology, which allows for stretch & recovery without elastic. Elastic is heavy, hydrophillic and wears out over time. This fabric allow the Chugach Jacket to be as light as a 2-layer jacket with all the durability and reliability of a 3-layer product.
I strongly recommend 3-layer rain gear, I have tested many 2-layer fabrics, all have failed and some in the first hour of testing. The exposed membrane on 2-layer rain gear is too fragile to withstand the abuse of hard mountain hunting.
Toray’s patented Dermizax EV has a 20,000 mm waterproof rating & 20,000 MTPR breathability rating (the maximum amount of moisture that will pass through the membrane in a 24 hour period), which is the highest waterproof to breathability rating available with a stretch fabric. Dermizax EV is quieter and more durable than expanded PTFE laminates, which is a perfect combination for mountain hunting.WATERPROOFING IN MM Overview
- 0mm: obviously not waterproof in any way. Sieves, screen doors, basketball nets.
- 0mm-1000mm: rain resistant, but not rainproof. Most stretch-woven softshells fall here.
- 1000mm-5000mm: rainproof but not waterproof under pressure (sitting on or leaning against wet surfaces). Engineered (laminated) softshells, inexpensive rain shells, low-end ski and snowboard wear.
- 5000mm-15,000mm: totally rainproof and generally waterproof unless under serious pressure (extended sitting, submersion, heavy people sitting). Most proprietary coatings (generally, liquid polyurethane coatings that become porous when applied to fabrics and cured) fall in this range.
- 15,000mm-30,000mm: totally waterproof, even under serious pressure. High-end proprietary PU laminates, PTFE membranes. Can withstand shallow-depth submersion without leaking (fishing waders, drysuits for sailing).
- 35,000mm and up: Solid vessels and non-porous materials. Will deform or fail catastrophically before leaking. Plastic bottles, rubber galoshes, aircraft carriers.
We have tested this rain gear in some of the harshest conditions in the world, in wet and high-humidity that typically makes waterproof & breathable’s useless. The Chugach Gear performed flawlessly because of the incredible breathability of Toray’s laminate.
Please let me know your thoughts, comments and any questions, I love to hear your feedback.