Warranties (generally)
Representations about past or present facts [existing facts] about the world (e.g. this car is blue, this car has 50,000 miles on it); assert that the representations are true
UCC 2-313: Express Warranties by Affirmation, Promise, Description, Sample
Express warranties by seller created by (a) affirmation of fact/promise made by seller to buyer related to goods and becomes part of basis of bargain