My sleep system consists of a sleeping bag, pad, camp socks and camp footwear. For this trip where we were camping between 6000' and 7000' on snow, forecasted for a low of 31F, this meant:
Feathered Friends Vireo sleeping bag (personally rated to 30F)
Thermarest Neolite Air full length (all ready packed in the photo)
Patagonia wool expedition weight socks
FF down booties - but just the inner pieces to save space
Ski socks - the spare pair that I'll pull on day 4
When I have to melt snow for water, I budget 3oz per person per day for fuel. So for this trip, that's 9oz per day x 4 days = 36oz, or 4.5 x 8oz cans. Since we were considering staying out for a 6th day, we added a dinner and an extra canister.
Brooks Range Ultralight Rescue Sled, with Pro Spreader Bars and extra ski straps
Repair kit with multi-tool, tape, key parts, ski straps, and zip ties.
Cell phone (not shown, but appropriate for this trip)
Adventure Medical Ultralight first aid kits
Brooks Range 8'x10' Guides Tarp - velcro lining allows it to double as a 8'x5' bivy sack.
Beal 8.1mm x 30m rando rope - in pink. The blue line was an 8mm x 20m rope that we brought along for crevasse rescue practice.
Black Diamond Couloir harness
3 locking biners
4 non-locking biners
shoulder length dyneema sling
double-shoulder length dyneema sling
5mm x 3m cordellette
6mm x 3m power cord cordellette
5mm autoblock cord
BD Raven Ultra Ice Axe, 50cm
Backcountry Access Magic Carpet skins
BCA Carbon 260 probe
Dyanfit ski crampons
BCA B1 Ext shovel
My hybrid Life Link/BCA snow saw
BCA Tracker 2 beacon
BD carbone fiber fixed-length poles.
Personal cook gear - thermos, 500mL nalgene, Fozzil bowl, spoons, iodine.
Navigation - maps, compass, gps, and notebook
Ski - skin wax, scraper, thermometer, inclinometer
Sun - goggles, sun glasses, sunscreen
Light - headlamp, second headlamp, 3 lighters
Other stuff - camera, blue bags (for the toilet)