I got two king pillow cases in silver blue, two king pillow cases in black, king fitted sheet in silver blue and a king duvet cover in black. Didn't get the flat sheet since I always get tangled up in it.
The flat sheet protects your duvet so you don't have to wash it as often, I believe....but the duvet cover goes to the cleaners with the rest of our silk bedding so it's not really an issue for us.
I couldn't find Tenestar for sale in Canada but I think you can use
The Laundress delicate wash, Heritage Park silk and wool detergent or Molly's Suds delicate wash liquid.