Long underwear, also called long johns, or thermal underwear, is a style of two-piece underwear with long legs and long sleeves that is normally worn during cold weather. It offers an advantage over the one-piece union suit in that the wearer can choose to wear either the top, bottom or both parts depending on the weather. Long underwear is also less commonly known as long handles. It is commonly worn by people in cold countries.

Modern long underwear has largely supplanted the union suit. In the United States, it is usually made from a cotton or cotton-polyester-blend fabric with a box-weave texture, although some varieties are also made from flannel, particularly the union suit, while many newer varieties are made from polyester, such as the Capilene trade name.

European manufacturers use wool blends or even 100% wool, usually Merino or other high-quality wool. Some models might include a thin layer of polyester to transport moisture away from the skin. Wool, in addition to being fire retardant, provides highly effective insulation and will keep its insulating properties even when wet, as opposed to cotton.

American Dragon: Jake Long is an American animated television series produced by Walt Disney Television Animation. It premiered on Disney Channel January 21, 2005 and became discontinued on September 1, 2007. The show currently airs on Disney XD in the United States. In the United Kingdom it originally aired on Disney Channel, but has now moved to Disney XD and airs on Disney Channel in Australia and Mexico.

Set in New York City (specifically the borough of Manhattan), this animated series tells the story of thirteen-year-old Jake Long who must balance ordinary adolescent transformation with the amazing power and ability to change into the form of a dragon. When he eventually unlocks his full potential and turns into the American Dragon, he will overcome obstacles to protect the magical creatures living in the city, but as his ordinary self, Jake Long can't conquer his crush on pretty blond schoolmate Rose who, unbeknownst to Jake, has an amazing dark secret of her own. She's a natural dragon slayer named Huntsgirl. Jake navigates the city with fellow skateboarders Trixie Carter and Arthur P. Spuddinski (A.K.A Spud), and when he gets home, it's to an extended family: a businessman dad originally from the Midwest who doesn't know he's married into a family of dragons, Jake's Chinese mom, his grandfather (who recently immigrated to train his grandson in the ways of the ancient dragon), younger seven-year-old sister Haley (a nascent dragon) and Grandpa's gruff sidekick, a magical Shar-Pei named Fu Dog.