Below are the parts to an ECWCS

Gen 1
-------- Generation 1
E.C.W.C.S
Extended. Cold. Weather. Clothing. System
1. Under T-shirt, usually a polypropylene moisture wicking type
2. Thermal underwear "drawers" polypropylene type
3. Thermal fiber/pile Woolybrown bear
4. Bib overalls, cold weather, fiber/pile, Woolybrown bear
5. Liner, cold weather field pant
6. Liner, cold weather, field coat
7. Pants, cold weather, field, nylon/cotton
8. parka, Extended Cold weather, camouflage
9. Pants, Extended Cold weather, camouflage
10. Parka/Pant, 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. Mittens, Extreme Cold Weather
16. Mittens, Cotton, White
17. Patrolcap, camouflage
18. Balaclava hood
19. Socks, men's, nylon, cushion sole, stretch type
20. boots, cold weather, Type 1-black, Micky Mouse boots, bunny boots
21. Boots, extreme cold weather, Type 2-White, Micky Mouse boots, bunny
22. Suspenders
_________________________

------ Gen 2
-------- Generation 2
E.C.W.C.S
Extended. Cold. Weather. Clothing. System
Two layers of Polartec was added
Polartec 300 Shirt
Polartec 200 Overalls
___________________

------ Gen 3
-------- Generation 3
E.C.W.C.S
Extended. Climate. Warfighting. Climate. System
Level l - T-Shirt, Thin Sand Colored Moisture Wicking
Level ll - Thermals, Middle Weight, Poly Top & Bottom
Level lll - Thick Fleed Jacket
Level lV - Wind Breaker, Nylon
Level V - Soft Shell, Nylon, Water Resistant Top & Bottom
Level Vl - E.C.W.C.S. Parka & Pant
Level Vll - Parka & Pant, Very Thick Layer