We have a week of 7 Day Challenges for you and the first one today features Bellatrix from Canada who's looking at thermal leggings from a couple of brands throughout the week. It can get to 30 degrees below zero where Bellatrix lives so who better to review these. It's the final day and we get the lowdown on the Under Armour women's ColdGear® base 4.0 leggings before Bellatrix then picks her favourite from the whole week.

"They do look warm and fuzzy on the inside but they do not look very fitted like the others."
Bellatrix