Confidence votes 210. Antigone is considered a tragic hero, because tragic heroes have several qualities: They are royal, they have a tragic flaw that leads to their downfall, they have an unhappy ending, and lastly the character is worthy of concern. First, Antigone is royalty. This is shown through her bloodline in several ways.
The down feathers of eider ducks provide insulation due to lack of barbules and ability to fluff. Infrared image of a goose, showing its insulating capacities. Down feather structure is important for insulating properties. Eiders insulate their arctic nests with down feathers. Click/tap images for attribution and license information.
Water-Resistant Down. Down feathers offer powerful warmth, but they do have a weakness: moisture. A new type of water-resistant down insulation addresses this weakness by treating down with a water-resistant coating in order to keep it from absorbing water. Water-resistant down is simply down insulation treated with a water-resistant coating at a molecular level. Before the down is packed into a jacket, each feather is treated with a special nanomolecular coating that allows the feather to resist moisture (also called a hydrophobic coating).