I am still using a 1.5 tog on lo at night as our room temp is still showing between 20-22 degrees. He is in a full body sleep suit with a singlet underneath & doesn't seem to be cold during the night or in the morning. Just wondering when I should change to a 2.5? Also for the Aussie Mummies here, we are coming out for a visit in 9 days, would a 1.5 tog be ok or should I bring my 0.5 tog too? We will be there from the 17th Oct - 21st Nov.