Throughout Dragon Age: Origins characters can collect item sets that provide extra benefits when equipped together. The various pieces of each set can come from various tiers and still return set benefits. For example, a tier 4 (hardened leather) leather armor will reduce skill costs when matched with a tier 2 (cured hide) leather boots and a tier 1 (rough hide) leather gloves. However, tier 4 studded leather boots would not enable that benefit, belonging to another item set. Also, helmets are not required to complete most sets, nor do they usually benefit from being equipped with "matching" gear.