Having first tried these Heattech leggings a couple of winters ago, I am now re-ordering a new supply. The items from this range a very light weight & easy to wear under other clothing without adding bulk. I use one pair of leggings as home wear, they look great with the long t-shirts & vests & the other pair as a base layer when out walking & climbing. The only draw back I find is that with me being long in the body, I find the crotch could do with being a little longer but I'm going to try the next size up as this is what is recommended in the size guide. They wash & wear really well as do the long sleeve tops from the same range & I have recommended the heattech range to family & friends. I'm also going to try out the socks as I so hate cold feet.