Insight into Kit - Laid out and ready to pack.

The kit needed for an expedition in the Himalayas is extensive. You need a variety of different layers to ensure you stay warm and dry. Technologies that enable sweat to be pulled away from the body are key in base layers, warm mid layers that breath are essential and outer layers that protect you from the elements are a must.
Different kit will be required at different stages of the climb. Generally the higher we go the colder it will be but the Himalayan sun could change that on a long afternoons trek. The temperature could soar and we will be down to just a base layer and trekking pants.

Kit for Cho Oyu

　
From Top Right:
Base Camp Down Jacket, Himalayan Parka and Pant, Himalayan Mitten, Primaloft Jacket, -30 and -40 degree Sleeping Bag, 6 x Smartwool Socks, Oakley Goggles, Midweight and Heavyweight Gloves, 2 x Jublo Explorer Glasses, Head Torch, 2 x Thermerest, First Aid Kit, Thermal Mug, Bowl, Spook, Suncream and Lip Balm, Hat, Beanie, Balaclava and Thermal/Light Buff, Gore Tex Jacket and Pant, 2 x 1ltr Water Bottles, 1 x half ltr Water Bottle, 2 x 1ltr Pee Bottles, Apex Jacket, Apex Alpine Pant, Powerstretch Top and Bottom

From Bottom Right:
 Foam Mattress, Gaiters, Multiple Stuff Sacks, Fleece Tops (100-200), Treking Shirts, Convertable Treking Pants, Base Layers, Harness, Gear, 2 x Crampons, Flask, Bivvy bag, Axe, 50l Bag and 65l Bag, La Sportiva Olypus Mons Expedition Boots, Bivvy Boots and Trainers

I need to fit all that into 2 Exhibition bags and keep the weight under 30kg.