Boots Boots need to be of good quality, well broken in and have a good chunky tread on the sole. A medium to heavy weight jacket with a hood. Big enough to get on over your boots Gaiters. Essential for all weeks. Lots of layers.
Mittens are warmer.
Bring a spare pair too. Around 30 - 45 Litres is the best size Plastic Rucksack Liner. Most Rucksacks are not waterproof Survival Bag. The essential minimum survival kit. Headtorches are best.