Best way to get bobbly bits off a wool mix jacket?

[Lottapianos]

I bought a lovely duffel jacket from Uniqlo last year. It's fab but because I wore it to work, and I carry a rucksack to and from work, the back of it and underarms have gone seriously bobbly. What is the best way to remove them? Any little device you can buy that will leave it looking good as new?

Thanks

You need one of these.

I knew there had to be a little nifty gadget out there somewhere! Thanks dexter73

A razor does the job just as well - one of those plastic disposable things works well

I tried a razor Sir but it was pretty useless, although maybe I wasn't brutal enough!

It needs to be very sharp - and you just sort of shave the jumper iykwim?