Scarf Of Warmth

Scarf of Warmth: This woolen scarf provides the wearer with a +4 bonus on Fortitude saves made to resist the effects of cold weather (see Cold Dangers, page 302 of the Dungeon Master’s Guide).
A scarf occupies the same space on the body as an amulet, necklace, or other item worn around the neck.
Faint abjuration; CL 3rd; Craft Wondrous Item, endure elements; Price 250 gp.

Source: Complete Adventurer Pg 135