Implied and express terms are two types of contractual terms. Implied terms arise from necessity, the conduct of parties, or general commercial practices, while statutes can also lead to implied terms. Express terms, on the other hand, are those agreed upon by parties in written or oral form before entering a contract. The term 'OFFICE PRO X9 provides sufficient lower-back support' is an example of an express term, specifically a pre-contractual statement. In addition, exclusion clauses can be used to limit liability, but only if they meet certain conditions under the Unfair Contract Terms Act 1977. If these conditions are not met, such as in cases where there is innocent misrepresentation, the clause will not be enforced.