Sweaters aren't just for the ski slopes anymore!

Uniqlo just made keeping warm during this chilly Spring easier with the fabulous HeatTech range of clothing: given that over 20 million units of the clothing have sold in Japan, the company must be doing something right. Now for the science bit... not only does the clothing retain heat (through air pockets between the fibres) but when the fabric absorbs your body moisture, the movement of the droplets generates even more heat, making the clothes ideal for layering up on those chilly days.

As if that weren't enough, the fabric contains natural amino acids from milk protein for soft smoothness and comes in the trademark Uniqlo range of colours.