Get a Distinctly Home Gel Fibre Duvet for only $99, originally $249 at The Bay Canada. Available in double/queen size.
It is a medium weight duvet with a 300 thread count, good for spring and fall on its own, or for winter with a bit of layering. I always find summer too hot for a duvet, but it would depend on what kind of climate you live in.
I like the stripe pattern on it, really looks nice.
The Bay Canada is also offering 50% off all other Distinctly Home duvets and pillows if you are in need of something different. The sale includes real down duvets, pillows, and more.
If you are an HBC Card Member, you will get free shipping when you spend $45 or more. Otherwise, shipping is free on orders of $99 or more.