Supergirl suits

The Supergirl suits are a series of protective suits worn by Kara Danvers wears as the superheroine, Supergirl.

First suit
The first in Winn Schott's line of suits for Kara Danvers included a blue tank top with splits at the hips, red shorts with a golden strap around them, and a red headband. The suit was immediately discarded by Kara, who proclaimed that she "wouldn't even wear it to the beach", never mind "flying around, saving people" in it.

Second suit
Winn designed second suit for Kara after she refused to wear her first one. This suit was less revealing and a lot more appropriate for her to wear in public. It consisted of a blue shirt with red stitching, a red skirt with a golden strap, and red Dr. Martens and socks. A cape was later added to the suit, as they realized it aided with aerodynamics, after Kara kept on crashing into nearby objects while trying to make sharp turns mid-air.

Third suit
The third and current suit that used by Kara is based on the same design as the second suit, but it includes the House of El's coat of arms emblazoned on her chest, similar to Superman's suit. Moreover, tights and over-the-knee red boots have been added. However, the cape always ended up getting damaged after Kara's heroic excursions, no matter what materials Winn used to make it. Ultimately though, James Olsen presented to Kara a present: Kal-El's blanket from when he arrived on Earth to use as a cape, as it wouldn't fray.

The third suit was heavily damaged during Kara's first battle against Reign. However, Winn presumably repaired it/designed a new copy for Kara as she recovered.

Upgrades
Supergirl and Superman's suits were briefly upgraded when Winn built shields to protect them from Metallo's Kryptonite blasts. The shields would be worn on the chest area.

History
After saving a plane from crashing, Kara decided that she wished to become a superhero like her cousin. She later revealed her identity to Winn Schott and he helped make a suit for her. Winn had a number of versions made for Kara before she finally settled down on her current one.

Functions

 * Cape: When the suit was first made, the suit did not include the cape, as Winn claimed capes were lame. However, a short time later when Kara went flying, and ended up crashing, Winn realized that capes aid in aerodynamics.
 * Advanced durability: It is unknown what materials the suit is comprised of, however, the suit is just as durable as Kara; as bullets cannot penetrate it, even explosives from missiles, and highly concentrated bursts of energy from Reactron and Metallo respectively could not damage it.
 * Suit release: The suit now is able to release Kara's protective suit just by pressing the emblem on the suit.

Known users

 * Kara Danvers/Supergirl

Supergirl
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Behind the scenes

 * Supergirl's costume is the only Colleen Atwood design among the main line of DCTV heroes who has not changed as of Season 4. Both The Flash and Arrow original costumes had been changed by the time of their respective fourth seasons.
 * The original version of what would be the archetype for Supergirl's costume (albeit not Kara Zor-El's) was first featured in Superman vol. 1, #123 (1958) and was created by artist Dick Sprang. When Kara Zor-El debuted as Supergirl in Action Comics #252 (May, 1959), the outfit was slightly modified by artist Al Plastino, by changing the color of the skirt from red to blue. Although she has had several different costumes in the comics through the years, the original look has been the basis for most of them. Kara's costume on the show is also considered to be based on the original one.
 * Designer Colleen Atwood "urbanized" the classic Supergirl look as a reference to the "street-style action hero of today".
 * When Kara walks against the bullets in the pilot episode, she is seen using red Dr. Martens and socks, resembling the red shoelace boots used by Linda Danvers/Supergirl.
 * Kara's first failed costume attempt combines elements from several costumes, worn previously by the character in her appearances in the comics and other media. The red "hot-pants"/shorts were part of her outfit, that debuted in Adventure Comics vol. 1, #410 (1971), while her red headband was first seen in screen tests of the live-action Supergirl film (1984), that were not part of the final production version, before being included to her comic book costume in Supergirl vol. 2, #17 (1984). The first of Supergirl's costumes to include a bare midriff look was first seen in Superman: The Animated Series ' episode, "Little Girl Lost" (1998), later being incorporated into the comic books in Supergirl vol. 4, #51 (2000) and in a newer version in Superman/Batman vol. 1, #13 (2004).
 * Along with many other elements from the TV series, the suit was incorporated into the 2016 comic book title Supergirl, as suggested by artist Cameron Stewart.