From Pathfinder Lost Omens The Grand Bazaar, which isn't enabled.

Swarmsuit (Impenetrable)

ITEM 8

Price 420 gp

Bulk L

Category unarmored

AC Bonus +0

Dex Cap +2

Check Penalty −1

Speed Penalty −5 ft.

An impenetrable swarmsuit is made of expensive, finely crafted mesh designed to completely prevent swarms from getting inside. You gain resistance 10 to physical damage from swarms. Explorer's clothing altered in this way has a Dexterity cap of +2, check penalty of -1, and Speed penalty of -5 feet regardless of your Strength.

Pathfinder Lost Omens The Grand BazaarOGL