Source Legacy of Fire Player's Guide 26
Aura moderate transmutation; CL 7th

Description

These boots are cracked and weathered from the desert sun. When you wear dunestrider boots, you may walk on sand as if it were hardpacked earth. Overland movement across sandy desert is treated as plains. Even loose sand and quicksand are not difficult terrain for you, allowing you to cross them at normal speed.

Construction Requirements

Craft Wondrous Item, expeditious retreat, longstrider; Cost 1,500 gp