From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Avalanche Boots

ITEM 17

Price 15000 gp

Usage worn shoes

Bulk 1

While the insides of these boots are comfortable, fur-lined leather, the outsides are a jumble of slate plates, giving the impression of a rockslide. You gain a +3 item bonus to Athletics checks and a +2 circumstance bonus to Force Open and Shove. When you invest the boots, you either increase your Strength modifier by 1 or increase it to +4, whichever would give you a higher value.

Activate (concentrate)

Frequency once per hour

Trigger You succeed or critically succeed with a Shove

Effect If the Shove was a success, you push your opponent up to 10 feet instead of 5 feet. If the Shove was a critical success, you push your opponent up to 20 feet, and you can then choose to knock them Prone.

Pathfinder Treasure Vault (Remastered)ORC