The material below is Open Game Content from a 3PP Source
Cloak of Arachnida
Aura moderate conjuration and transmutation; CL 6th
Slot shoulders; Price 14,000 gp; Weight 1 lb.
This black garment, embroidered with a web-like pattern in silk, gives the wearer the ability to climb as if a spider climb spell had been placed upon her. In addition, the cloak grants her immunity to entrapment by web spells or webs of any sort; she can actually move in webs at half her normal speed. Once per day, the wearer of this cloak can cast web. She also gains a +2 luck bonus on all Fortitude saves against poison from spiders.
Requirements Craft Wondrous Item, spider climb, web; Cost 7,000 gp