Duster
Dusters are currently one of two available hot-weather garments available in the game - the other being the Cowboy Hat. As Parkas are necessary to survive in very cold biomes; Dusters are necessary to survive in very hot biomes (e.g. Arid Shrubland, Tropical Rainforest, Desert etc.), and recommended for temperate biomes (i.e. Temperate Forest), as both are suspect to heat waves and the former can handily reach around - or even exceed 60 degrees Celsius at the peak of summer. Pirate and Outlander raiders will wear dusters in sufficiently high temperatures as appropriate.
As a complicated garment, Dusters can only be made at tailoring benches, which requires complex clothing to be researched in order to be constructed. A duster requires 80 of any textile, and 367 seconds of work (22,000 ticks) to be created, assuming baseline global work speed and no enhancements or hindrances to consciousness, sight, or manipulation.
Dusters are overall superior to Jackets in the respect that Dusters have the same base cold insulation, but also covers more body parts (torso, neck, shoulders, arms and legs), and also offers blunt protection - at the slight cost of sharp protection (7% vs 8%). A duster made out of any wool provides cold insulation on part to that of a standard parka, along with heat insulation, less of a movement penalty, and no penalty to overall global work speed.