From Pathfinder Adventure: The Slithering, which isn't enabled.

Slippery Ribbon

ITEM 1

UNCOMMON CONSUMABLE MAGICAL TALISMAN

Price 12 gp

Usage affixed to armor

Bulk —

Category talisman

Usage affixed to armor

Activation envision

Trigger You succeed at an Acrobatics check to Tumble Through, but you don't have enough Speed to move all the way through the enemy's space

Requirements You are an expert in Acrobatics.

This ribbon is constantly greasy to the touch and stains the armor it's affixed to. When you activate the slippery ribbon, your Speed increases by an amount necessary for you to move all the way through the enemy's space.

Pathfinder Adventure: The SlitheringOGL