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. We are back with Mountain Warehouse for the penultimate Day as Bellatrix has these pacesetter womens thermal run tights to try on. Remember to come back tomorrow for the final day of her week long challenge and find out which was her favourite.

"They're really cool and they have a zipped pocket on the back and there is a double seam design going down the side which is nice." Bellatrix