I have probably an odd question for autograph hunters. I have a project in mind to honor the hockey team on the local military base as part of my collection. I was able to order a jersey similar to what they wear, as well as a pair of new hockey socks. I'm wanting to get the team to sign the socks (don't worry- they're still brand new in bag) and put them in a shadowbox with a couple of military patches and pucks.

My question is what should I use on the socks to get their autographs? Sharpie? Paint pen? Off-hand, I am not certain what the socks are made of?