Sleeping Bag Confusion

Dear Dr. Telemark,
Recently I have been looking to buy a new down sleeping bag to replace my old worn out Dacron bag. Frankly I am confused. Salespeople in the outdoor shops mention such things as ‘slant wall baffles’, ‘mummy shape’and ‘pertex liner’. Also fillings such as duck down, goose down and I overheard one of my workmates mention fairy down. Could you advise me which is the best sleeping bag for all round use and what are the advantages of fairy down over the other downs?
J.A. (Mr) Melbourne

Dear JA
You certainly are confused. The purchase of any equipment is always confusing due to the proliferation of styles, models and manufacturers. When purchasing gear first get advice from fellow walkers before visiting the shop. That way you will be much better informed on the styles and types of equipment available.
Dr. T.