Winter's Shelter Shield Skin
From Guild Wars 2 Wiki
“Double-click to consume.
Seasonal. For sale only during the Wintersday season. Use anytime to upgrade the appearance of a shield. Usable only by shield wielders.
— In-game description
All Wintersday wooden weapons have a wintery snowflake glow as well as a pulsing white branch design. The shield's branch and gingerbread design is centered on the shield's body. A picture of the shield's glow can be seen here.