Second hand PHD sleeping bag (5º to 10º rated) via eBay - 400g, £150 Karrimor X-lite bivi - 200g, £30
Optional mat - cut length of 1/8" closed cell foam - 80g, £10?
If you're racing, you don't need an insulation layer. So no down/synthetic jacket. That saves a load of weight and space. Make sure you have a good waterproof layer.
Second hand PHD sleeping bag (5º to 10º rated) via eBay - 400g, £150
Karrimor X-lite bivi - 200g, £30
Optional mat - cut length of 1/8" closed cell foam - 80g, £10?
If you're racing, you don't need an insulation layer. So no down/synthetic jacket. That saves a load of weight and space. Make sure you have a good waterproof layer.