"Cozy and Efficient: Polar Bear-Inspired Sweater Defies Thickness to Keep You Warm"

Chinese scientists have developed a sweater made from a synthetic fibre that mimics the insulating properties of polar bear fur. The sweater, which is one-fifth as thick as a down jacket, offers comparable warmth and durability. The fibre, created using a process called freeze-spinning, maintains its heat-trapping properties even after being stretched, washed, and dyed. The researchers believe this technology could be used in lightweight and durable clothing for sports, military, and space applications, eliminating the need for animal fur or down. However, further improvements are needed to scale up production for mass use.