Might be worth going into a proper shoe shop or decent Cobblers to see what they recommend for your particular boots. It's easy to buy the wrong stuff, especially if you're not sure about what they're made of.
Something that's often overlooked is drying your shoes properly. So many people just come in from the wet and either leave their shoes soaking, or stick them near a heater. My missus did this with a new pair of boots, and they now have hard, dark areas where the boot creases. Rather than admit she's knackered them, she claims she prefers the weathered look
