Womens MegaWarm Jacket

Rene is 5'7'' and wears a women's size small.

Womens MegaWarm Jacket

Size Guide

The World's Warmest Jacket

The MegaWarm jacket is the ultimate LifeLabs innovation, giving you the warmth you need at the top of a mountain or on the coldest winter days in the city. Fully waterproof and remarkably light for its scale and coverage, the MegaWarm Jacket defies common standards for insulated apparel. With the highest CLO rating of any jacket in existence (9.25), MegaWarm is the planet’s warmest jacket. 


Sustainability Index

We make every effort to reduce this product’s impact on the earth. 

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Sustainable Packaging

MegaWarm is shipped without excess: no tags, plastic, or swift tacks. Its protective wrapping is a reusable garment bag for off-season storage. 



Earth Friendly Materials

Our MegaWarm Jacket is constructed with 87% recycled materials by fabric weight.

We use 100% recycled polyester labels and sewing thread.

Recycled zippers (YKK Natulon)

This garment uses trims that are 50% bio-based, made from agricultural waste from rice stems and husks.

PFC-free DWR (durable water repellent without forever chemicals)

Chemical Impact

10% reduced chemical impact

Fossil Fuel Depletion

17% less fossil fuel depletion

Water Pollution

2% less water pollution

Global Warming Potential

7% fewer CO2 emissions


Compared to products that use non-recycled polyester. Based on Higg MSI 3.2 data at Higg.org Percentage reductions pertain to the finished material phase.



CLO Rating

  1. The standard measurement of how warm a textile keeps you (the higher the CLO, the warmer you are).
  2. The degree of insulation provided by an article of clothing. 
  3. LifeLabs CLO levels are significantly higher than materials almost 30% heavier. 

Infrared Radiation

  1. A type of electromagnetic radiation produced when atoms absorb and then release energy with a frequency lower
than visible light.
  2. Thermal energy your body is producing all the time. 


  1. The measure of an object's ability to emit infrared energy (heat by radiation).
  2. A low-emissivity material (like aluminum) acts as a radiant barrier and decreases 
the amount of infrared radiant heat
 that escapes. 

Higg Index

  1. A tool for the apparel and footwear industry to assess the environmental impacts of raw materials and the lifecycle impacts of products.
  2. The industry-leading value chain measurement methodology developed by the Sustainable Apparel Coalition.


  1. A regular organic or inorganic framework supporting a porous structure.
  2. A nano-scale cell structure that allows body heat to escape through pores to maximize comfort.


  1. Perfluorinated chemicals, or a subset of perfluorinated chemicals called perfluorocarbons are traditionally used in textile manufacturing to provide water repellency.
  2. LLD uses PFC-free water repellent finishes to lower or impact on the environment and human health.


  1. Large molecules made by bonding (chemically linking) a series of building blocks.
  2. Polymers are chains of chemically bonded atoms.


  1. A material that conducts infrared heat away from your skin at a higher, more efficient rate.
  2. Polyethylene has a low Materials Sustainability Index rating compared to conventional synthetic fibers used in apparel today.

QMax Index

  1. Measurement of thermal transport.
  2. A higher Qmax value indicates a faster tranfer of heat from the body to the fabric surface, resulting in a cooling effect.
  3. A measure of predicting the warm/cool feeling of fabrics.  


  1. The return of light, sound or heat from a surface.
  2. A reflective fabric or material reflects the body's heat back to itself.


  1. A type of homeostasis and a means of preserving a stable internal temperature in order to survive.
  2. Thermoregulation is the maintenance of a relatively constant core body temperature.


  1. Allowing the passage of a specified form of radiation.
  2. Honest and open; without secrets or deceit. Transparency in materials means that the textile barrier blocks natural elements (like rain and sunlight) and allows other to pass through (like persperation and body heat.)

Sizing & Fit

Body Length 29 1/2 30 30 1/2 31 1/2 32 1/2
Chest 36 1/2 39 41 1/2 44 1/2 47 1/2
Sleeve Length 30 30 1/2 31 31 3/4 32 1/2


The MegaWarm Jacket is designed with extra space for layering. We recommend you size down one from your regular jacket size.

Body Length 74.9 76.2 77.5 80 82.6
Chest 92.8 99 105.4 113 120.6
Sleeve Length 76.2 77.5 78.7 80.6 82.6


The MegaWarm Jacket is designed with extra space for layering. We recommend you size down one from your regular jacket size.