From what I can tell it is not a hybrid. I did not see F1 or Hybrid in their description or Martha Stewart's description. Check your packet to make sure. If a hybrid it is suppose to say F1 or hybrid.
I've never grown this variety, but if you like it, and it is OP, yes, you can save seeds.
To get seeds from cucumbers, you need to let them get old on the plant. So later this season, let a few stay on the plant. They will swell and change color to yellow or orange. Once they are fully ripe, you can harvest them.
You then need to scoop the seeds out into a container to let ferment like when saving tomato seeds. Add a little water to make sure it doesn't dry out before fermentation is done which will take a few days. Once it is done, people often add water to the container to remove all the yucky stuff until it is just water and seeds. I personally like to dump the container into a mesh colander and then rinse under water until the seeds are clean.
Remy

That's first think I checked - "F1" or "Hybrid"
but they dont say.
Anyone grow these? How about yields?
and do they need staking? or Tying ?
I dont fancy leaving my vines to lie on the mulch.