UNIQLO is positioned as "slow fashion", with products based on basic models, emphasizing fabric quality, less affected by fashion, relatively stable styles, and slow iteration. In 2017, Double 11, UNIQLO achieved sales of more than 100 million yuan within 0:1, becoming the fastest brand of Tmall women's clothing to break 100 million, and offline sales are also hot, and its HEATTECH series of warm underwear has always been a star product.
 
The HEATTECH series, which claims to be hygroscopic and heat-absorbing, is far from being as "high-tech" as its name suggests, in fact, the phenomenon of hygroscopicity itself generates heat, as is the case with all underwear. It can be seen from the underwear logo that the composition of HEATTEECH fabric is ordinary chemical fiber polyester, acrylic, viscose and spandex, and its moisture absorption capacity is not much different from other chemical synthetic fiber thermal underwear.
 
HEATTECH's special cross-sectional technology and knitting method do bring a warm and comfortable skin feel, but its poor water absorption and sweat wicking ability and the problem that the fabric is easy to pill have been criticized by the public. Fortunately, HEATTECH has inherited the consistent style of Uniqlo, the style is simple and beautiful, and the classification is meticulous and perfect, there are three kinds of autumn clothes such as basic warmth, double comfort warmth and high comfort warmth, the warmth level is increased in turn, they use the same raw materials, but the higher the insulation level, the greater the proportion of acrylic and viscose.
 
In addition to the traditional round neck, U-neck, V-neck, ballet collar, high-necked 8-quarter sleeve, 9-quarter sleeve and long-sleeved underwear, there are also suspenders, short sleeves and women's own BRA styles are available, and the price of a single piece ranges from 59 yuan to 99 yuan. AND EXTRA WARM AND ULTRA WARM DUE TO STRONGER WARMTH, MINUS THE STYLE OF SUSPENDERS AND SHORT SLEEVES, AND THE HIGH NECK HAS ALSO BECOME A DOUBLE HIGH NECK, WHICH IS MORE SUITABLE FOR WEARING IN COLD WEATHER, AND THE PRICE OF A SINGLE PIECE IS 149 YUAN AND 199 YUAN RESPECTIVELY.
 
Perhaps it is precisely because of the high-tech title of HEATTECH that the public's expectations for the series are too high, so it seems "unworthy of the name". If you put aside the term HEATTECH, UNIQLO's thermal underwear is not inferior to most products on the market.