Coolth suits were environmental suits designed for cold-adapted species like Ensos to survive on worlds with high temperatures, such as Tatooine or the Bright Lands of Ryloth or Cairns. For example, Ensos, used to the freezing temperatures of Ensolica, were forced to wear these cumbersome suits in order to avoid near-instant heatstroke. Coolth suits temperatures were adjustable, but cheaper models were often locked into presets to reduce mechanical deterioration. This sometimes led to travelers having to wear thick insulating garments underneath their coolth suits to prevent hypothermia.