XTdoll’s mix-doll was the first in the industry to try a silicone head with a TPE body. The term “XT” refers to “X-treme” (extreme), which has made significant changes to all the body details of XT’s series of dolls , including doll’s head makeup, finger bones, toe bones, knee structure, and reduced body weight. After years of development, the doll’s details are extremely precise.