F1 = 1st generation puppy -50% purebred-A and 50% purebred-B - for example, a Golden Retriever to Poodle cross, this is first generation, resulting in healthier offspring. In this particular Goldendoodle cross hair type can be smooth like a Golden, wirey look like a Irish wolfhound or Wavy/shaggy, they can shed or not shed, pups in the same litter can vary. This is not the best cross for people with severe allergies.