JMT Jacket

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Minimalist 2 season synthetic insulated jacket for light layering. At 7 ounces for a size medium the hooded JMT packs tremendous warmth and function in a small, all conditions package. 

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$195.00

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The JMT Jacket is our lightest insulated shell. Designed for summer layering in the mountains, it's named after the classic John Muir Trail in the Sierra. View it as an insulated windbreaker.

Built with Climashield APEX, a lightweight yet remarkably efficient synthetic insulator, the JMT Jacket will retain some warmth when damp, and will dry and recover more quickly than down. 

Utility

The JMT Jacket is trim and devoid of clumsy features. It is best applied as a windproof, warming layer over one or two thin thermal shirts.

Additionally, the JMT can be put to use as extra core insulation while sleeping, thus making a lighter sleep system possible.

This is not an 'Active Insulation' layer. However the JMT would make a great companion piece to this new breed of outerwear, such as the Patagonia Nano Air Light, for comfort at a full range of conditions with very little weight and bulk. 

Design

This is a simple jacket, lean on features, with the focus being as much warmth for the weight as possible. In its basic configuration the APEX insulation makes up over 55% of the total weight.

The JMT is available with a full separating front zipper or a half length pullover style zipper. The latter saves 10-15g, but can also prolong the life of the garment while making it easier to handle in strong winds.

We build it with or without an integrated hood. The hood option is fully insulated and offers complete coverage to above the chin - but it is not helmet compatible. In fact, for most users, only a very thin beanie will fit under this trim hood.

The chart below reflects the JMT with a hood. Choosing a collar will save 20-25g depending on size.

We make the JMT Jacket without any exterior pockets. For now these are not available on a custom basis either. Interior pockets can be configured on the menu, placed either left or right at chest level plus two lower drop-in cargo pockets. Adds about 7g each.

The hood casing and waist hem have fixed, pre-tensioned shockcords. The Pullover Style does not have an elasticized waist cord.

The sleeve ends are cut trim with no additional closure offered.

Synthetic Fill

APEX by Climashield, a superior continuous filament synthetic insulation, is the choice here.

For the JMT Jacket we use 2.2oz/yd - 75g/m Climashield APEX which is light, compact, and applicable for 2, maybe 3 season use. With minimal sewn through stitch lines (virtually none on the shell), and substantial loft in the APEX, the JMT is surprisingly warm as well as very resistant to moisture from sweat and weather.  

Materials

The JMT Jacket can be configured with a 10d shell* in a number of different colors. It's an ultralight fabric for folks who want the lightest, but realize that abrasion and tear resistance is minimal.

Also available is a 7d shell** with advanced weatherproofing qualities.

The inside liner is always the breathable 10d. 

At this point we can offer more durable fabrics on a special order basis only. These include Epic and multi-cam. Please email or call.

*10d. Smooth, comfortable and about the lightest material possible for practical shell use, at 0.67 oz/yd. Very breathable with minimal moisture repellency. Also the standard inside liner. Black, Moroccan Blue, Burnt Orange, Coyote Brown and Royal Purple.

**7d. A special material based on an ultralight, yet relatively durable 7d base fabric with a breathable micro porous coating. The 0.74 oz/yd Robic excels at shedding mist and light rain. A so-called waterproof/breathable fabric, this high tech shell sports a HH (hydrostatic head) of 1000mm, while providing enough vapor transfer for mild activities (good breathability). 

Sizing

The cut is aimed at providing a short jacket with a trim fit, best when used over only one or two lightweight thermal layers. Compared to the Skaha line of down and APEX hoodies, the JMT Jacket is roughly a size smaller (L > M). 

The chart and configuration menu below outlines the many options for sizing the JMT Jacket. Tall people may wish to go up in zipper and back length. Likewise, folks with long arms will know when to add to the sleeves. 

Also see here.



Colors pictured: Moroccan Blue with Burnt Orange liner, and Black with Coyote Brown liner.

Grade 
09/22/2017

unboxing

The jacket arrived today.

First impressions are: WOW!

It fits me perfectly. I'm pleased I went for the longer back length and longer sleeves.

The material feels great and the jacket feels warm.

The #5 two way zip is superb - I've never been a fan of lightweight zips. The extra weight for it is so minimal.

The total weight is amazing - 239 grms!

Many thanks for such a superb piece of gear!

Best wishes,

G in the UK

    Grade 
    09/22/2017

    JMT

    I am very impressed with the JMT jacket I must say.
    no frills, all function, truly UL.
    thanx

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      JMT Jacket

      JMT Jacket

      Minimalist 2 season synthetic insulated jacket for light layering. At 7 ounces for a size medium the hooded JMT packs tremendous warmth and function in a small, all conditions package. 

      Product Options
        
        Quantity:
      Size
      Jacket or Pullover
      The JMT Pullover Style features a half length front zipper, no elasticized bottom hem and weighs up 15 grams less.
      Torso Length
      Adds a number of inches to the back and front length of the selected general size.
      Sleeve Length
      For folks with long arms, or skinny torsos.
      Shell Fabric

      Please see our Fabric Page for help choosing the right shell material

      Liner Fabric
      10d for ultralight priority, or 15d bright orange Pertex Quantum for safety visibility when inside out.
      Integrated Hood and Collar Choices
      Choose how to finish out the head opening. Getting an integrated hood eliminates all collars.
      Interior Zippered Chest Pocket
      With a vertical opening hidden behind the main front zipper, these pockets are protected yet easily accessed.
      If choosing just one consider a left side pocket for right-handers and vice-versa.
      Each pocket adds 8 grams in size large.
      Lower Drop-in Cargo Pockets
      These are large interior pockets with a plain top opening for bulky items. Not suitable for valuables or heavy loads.
        
        Quantity: