Ultimately this is your choice, but we would say yes. It’s important you keep yourself warm and down is without a doubt the best insulation. You will really feel the difference when the temperatures drop and especially on summit day. There are some very good synthetic brands on the market, and these have the advantage of still keeping you warm when they are wet but synthetic insulation is heavier and bulkier than down – you need a bigger, bulkier synthetic jacket for the same warmth as a lighter down jacket. Sleep helps us to recover from our trekking and is an important part of the acclimatisation process. So, our recommendation for a sleeping bag would again be down. Be sure to pick a bag with a comfort rating of -20oC and 3-4 seasons. You can buy silk or similar liners which will also enhance the warmth. With all down sleeping bags, the best way for you to keep warm is to remember to wear as little as possible whilst inside it. The heat from your body then warms the bag and the feathers retain the heat.
