I've been training for a few months in preparation for rejoing the reserve forces and have been using an old pair of Fila jeans trainers. The wife recently splashed out on a proper pair of running trainers for my birthday. The certainly reduced ankle and knee strain and even after 9 mile run both were fine, they would have been feeling strained on the old shoes. The problem is the new trainers are causing blisters in all sorts of places, the worst being the strange over-sized sockliner thing causing blisters on the in-step. Is this likely to be just because they are new, are rubbish trainers (Â£45 Reebok Premier Road Lite DMX) or should I just through the sock-liner out? I'm tempted to cut the strange extra bit off the liner but may just wreck the the shoe then. Thoughts.