Hilly Twin Skin Unisex Socklet (£10.25)Kerry says: Don't let blisters get in the way of your next PB. As frustrating as they are common, blisters can be painful enough to impede even the most focused of runners.Caused by a combination of friction

Gore Women's Mythos Thermo Shirt (£55.00)Kerry says: This multi-functional piece of kit provides excellent value for money. It's warm (and soft and fleecy) enough to keep you warm during cold winter runs, but not so warm that you can't pair

if you want to start shedding layers but don't want to throw caution to the wind. It's made from a dual density differential fabric which has two different sized yarns (large next to the skin and tight on the outside), which Nike claim improves the fabric