SEVEN LAYER (7L) are inspired by the multi-layered insulating system of the Generation III Extended Cold Weather Clothing System (GEN III ECWCS) derived from the U.S. Military. It allows their Soldiers to adapt to varying mission requirements and environmental conditions. The materials chosen offer a greater range of breathability and environmental protection, providing greater versatility in meeting Soldiers’ needs. 

The inspirational concept for our brand 7L (SEVENLAYER) comes from the actual ECWCS used by the US Military and other military forces around the world. ECWCS is the military acronym for “Extended Cold Weather Clothing System” and consists of several pieces of layered clothing designed to keep soldiers warm during extended periods of exposure to the cold. 

7L utilise innovative outerwear technologies and proven material sciences and fuse it with fashionable apparel. We invest heavily into researching our designs and materials, ensuring our customers receive some of the best products on the planet. 


The ECWCS is a protective clothing system developed in the 1980s by the United States Army Natrick Soldier Research, Development and Engineering Center in Massachusetts. Over the years there has been 3 separate generations of systems, each time improving innovation and effectiveness of that system.

The first generation of combat / protective outerwear consisted of a simple parka jacket and trousers.  20 additional elements of other individual clothing, including hand wear, head wear and footwear were used in various combinations to meet the cold weather and environmental requirements of the US military (and others).



The entire ECWCS ensemble (1st generation) consisted of:

  1. Undershirt, cold weather, polypropylene
  2. Drawers, cold weather, polypropylene
  3. Shirt, cold weather, polyester fiberpile
  4. Overall, bib, cold weather, fiberpile
  5. Liner, cold weather trousers, field
  6. Liner, cold weather, coat, men's
  7. Trousers, cold weather, field, nylon and cotton
  8. Parka, extended cold weather, camouflage
  9. Trousers, extended cold weather, camouflage
  10. Parka/trousers, snow camouflage, white
  11. Glove inserts, cold weather
  12. Gloves, men's and women's, light duty
  13. Mitten inserts, cold weather, (trigger finger)
  14. Mitten shells, cold weather, (trigger finger)
  15. Mitten set, extreme cold weather
  16. Mitten shells, snow camouflage, cotton, white, two finger
  17. Cap, camouflage pattern
  18. Hood or balaclava
  19. Socks, men's, nylon, cushion sole, stretch type
  20. Boots for Cold Weather
  21. Boots, extreme cold weather (Type II-white)
  22. Suspenders, trousers, M-1950


The parka which is a particularly popular component – is characterised by a cobra hood (which fits over a combat helmet) with woven nylon drawstring adjustable pulls and an attachment piece that allows fastening of a fur ruff (early models of the parka lacked this attachment piece). There is a two-way, full-front slide fastener to provide full-face protection, leaving only the eyes uncovered.

The parka has raglan shoulders / sleeves, a non-freezing, double-pull zipper with storm flap and a seven snap closure, a flap-covered pocket on the left sleeve with hook and loop (velcro) closure, adjustable hook and loop wrist cuffs, armpit ventilation zippers and double reinforced elbows.

A badge / insignia tab with snap is located on the storm flap.

There is an interior back ventilation opening, two slash (handwarmer) cargo pockets on the lower front (with extra large flaps and double hook and loop single snap closure on each) and an inside draft skirt (windskirt) with elastic drawcords and barrel-locks at the waist (without pulls).

There are also two concealed map pockets at the front zipper with hook and loop closures that can be opened without unzipping the parka.

Unfortunately, due to the limitations of "waterproof-breathable" fabric, the parka did not breathe well in field use by active troops.


The second generation (2G) ECWCS included two different layers made with Polartec fabrics: the Polartec Classic 300 shirt and the Polartec Classic 200 overalls.

When used in combination with other layers in the ECWCS system, the system provides protection between +40 °F and −40 °F (+4 °C and −40 °C). The parka was improved by vents to help deal with the condensation problems resulting from the use of "waterproof-breathable" fabric. A lightweight underwear set was also introduced to combine with or substitute the polypro undergarments.

The GENERATION III ECWCS is designed to maintain adequate environmental protection in temperatures ranging between -60 and +40 Fahrenheit (about -51 and +4 Celsius). 


The third generation 3G or GEN III Extended Climate Warfighter Clothing System is a radical re-design of the system. It features seven new layers of insulation including three Polartec fabrics: two layers of Polartec Power Dry and a layer of Polartec Thermal Pro High Loft. It has also featured PrimaLoft® Silver Insulation USA in the extreme cold weather parka and trousers. Initial fielding of the system began in August 2007 to the 73rd Cavalry Regiment in Afghanistan. The water-resistant "soft shell" is far more breathable than any "waterproof-breathable" garment and is used for most field applications, back-stopped by a waterproof nylon parka.