I'ves tarted a course of medication and therapy to try and rid myself of the dreaded GAS and so far it seems to have worked for my vinyl collection, I only bought 3 records last month.
The trouble with the Ultra bag is that it was always meant to be used as part of a system and when used on its own there is a lot of empty space that needs to be warmed up before the bag really starts to loft.
The closest modern equivalent is the PHD Combi bag
http://www.phdesigns.co.uk/product_info ... cts_id=217Only good to -5C and that is assuming wearing a cap and warm underwear and using a bivvy bag and/or tent, I have always believed that is not enough margin for error in our winters and think you need a bag good to -18C
Which is why I was and am looking at the half bag, the one I sold to was far too warm, it was good to -12 on its own