A simple upgrade would be to buy a silk or fleece liner. This will boost the efficiency of your current bag. Also consider wearing a long sleeve base layer top plus leggings & socks. Makes a lot of difference at a more modest financial outlay.
also, as has been pointed out, the rating of a sleeping bag is very relative. I'm lucky as I sleep 'hot', so I don't need a great deal of insulation at night. Other are not so fortunate, so it's a bit of a 'suck-it-and-see' situation.
also, as has been pointed out, the rating of a sleeping bag is very relative. I'm lucky as I sleep 'hot', so I don't need a great deal of insulation at night. Other are not so fortunate, so it's a bit of a 'suck-it-and-see' situation.