You can wear more magic items.
Benefit: Choose one type of magic item that has a limit on the number a character can simultaneously wear and gain its benefit. The character can now wear one more magic item of this type and also gain its benefit. (See Body Slots and Body Slot Affinities.)
Normal: Without this feat, a character is limited to one headband, hat, or helmet; one pair of eye lenses or goggles; one cloak, cape, or mantle; one amulet, brooch, medallion, necklace, periapt, or scarab; one suit of armor; one robe; one vest, vestment, or shirt; one pair of bracers or bracelets; one pair of gloves or gauntlets; two rings; one belt; and one pair of boots. (See Body Slots and Body Slot Affinities.)
Special: A character can gain this feat multiple times. Each time the character takes the feat, it applies to a new type of wearable magic item.
Source: Standard Reference Document under Open Game License v1.0a, which updated this feat originally published in the Epic Level Handbook, page 50.