Hi all, I used to have problems with side zippers but recently bought one of the Woodlore sleeping bags (The Osprey) from the Ray Mears site in the UK. I have used it twice since getting it and I found it very easy to access and manage in the HH as it has a central zip. While the bag is a bit on the heavy size at 2kg it is an excellent 3 season bag, much more comfortable than my Marmot Pounder Plus. Here is the link: Woodlore Sleeping Bag - Osprey, Sleeping Out