Express warranty - An express warranty is a written guarantee from the manufacturer or distributor that specifies the conditions under which the product can be returned,replaced,or repaired. An express warranty can be made orally, in writing and without the intent of the seller to actually create the warranty. However, a seller is allowed to assert statements of opinion of value, known as puffery, that the buyer cannot justly rely on as part of the basis for the bargain. For instance, "This hunting knife will last a lifetime", is mere puffery. Whereas a statement such as, "This hunting knife will never need to be sharpened" can be construed to be an express warranty as long as the knife is only used for its intended purpose.