Slim Flowsteel Belt

Slim Flowsteel Belt is a superior-quality equipment item available to purchase within the Watchtower; characters must attain a cetain level of renown with the STAR Labs faction before this item can be purchased, making it unique to hero characters only. Once equipped, the Slim Flowsteel Belt unlocks the STAR Ex waist costume style.

Source
The Slim Flowsteel Belt can obtained from Doctor Thomas, a Star Labs faction vendor found within the Meta Wing of the Watchtower. After attaining Cooperative renown with Star Labs, the item can be purchased for 13 Marks of Allegiance.

Vendor purchase

 * Doctor Thomas

Style unlock
Upon equipping the Slim Flowsteel Belt, a character unlocks the STAR Ex waist costume style, which can be accessed at any time from the Style Window.


 * STAR Ex