Cloak of the Bat (Greater)Equipment 17
Source Pathfinder Core Rulebook
Price 13,000 gp
Weight light
Sewn from several long strips of luxurious brown and black silk, this cloak grants you a +3 item bonus to Stealth checks as well as to Acrobatics checks to Maneuver in Flight. You can also use your feet to hang from any surface that can support your weight, without requiring any check, though you still must attempt Athletics checks to Climb in order to move around while inverted.
Activate 
command, Interact
Frequency any number of times per day
Effect You can either transform the cloak into bat-like wings that grant you a fly Speed of 30 feet for 10 minutes, or have the cloak turn you into a bat by casting a 4th-level Pest Form spell on you.
Effect: Cloak of the Bat
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
InvestedA character can wear only 10 magical items that have the invested trait. None of the magical effects of the item apply if the character hasn't invested it, nor can it be activated, though the character still gains any normal benefits from wearing the physical item (like a hat keeping rain off their head).
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
TransmutationEffects and magic items with this trait are associated with the transmutation school of magic, typically changing something's form.