Teched up and trimmed down??running shoes don't get a whole lot more practical or pretty than UGG Sienna Rain Boot. Special Sale UGG Sienna Rain Boot, and women weather for style UGG 1014452. A classic rain boot with high-gloss finish, the Sienna features waterproof construction and a sheepskin-lined insole to keep feet warm and dry. Add rainy-day functionality to any outfit, worn alone or paired with our rain boot socks, which are crafted to cuff over the top for customizable styling.