Here is a quick photo of the majority of the Winter Gear I prefer to take with me;



Exped Downmat 9 Sleeping mat - apparently good to -40C but I've never been in such cold conditions.
Alpkit Phantom Jacket in the Alpkit Compression bag - Hooded Down Jacket with showerproof outer
Lightwave zr0 cylq Tent - 4 Season tent single man which weighs in @1.3Kg
Vango Venom 300 Down bag.
Lifventure Silk Sleeping Bag Liner - adds another 2-3C to the Venom bags rating and helps keep the Venon Bag cleaner.
Primus EtaPower Pot 1 Litre - very fuel efficient pot.
MSR isobutane cartrige, folding Optimus gas stove, Ti Spork, Brunton Lighter, fuel tool which all fits inside the Primus Etapower pot.
Sigg Water bottle with Neoprene cosy - Secondary use as a hot water bottle.
UCO Candles and Latern - Nothing beats the warm comforting light of a real candle flame
Jansport Manbag containing 24hr British Army Operational Ration Pack.
Lifesystems Trekker FAK.
Thermarest Orange Lite Seat - Can also be used a pillow.
Fenix P3D and Alpkit Head lamp.
Double Walled Snowpeak Ti Cup - keeps brew ups nice and warm.
Jetstream Jacket - Sometimes even a windproof fleece can be too warm at high activity levels in the cold.
Bacho Laplander and Helle Odel Fixed blade knife - No metal handles.

There are many additional items not shown of course such as a map and compass, GPS etc, but this provides the basis for my winter kit.

I have actually posted a kit list before here at

http://forums.equipped.org/ubbthreads.php?ubb=showflat&Number=121523