I second Evan's suggestion. The Pure Mohair skins are floppier and lighter weight. The thin material is much more flexible than other skins, so they don't fold together as easily as mixed, or nylon skins. They glide better, and are more for long tours where the ascent is not too steep. The Nylon and Mix Mohair/Nylon are more for climbing. The 110 will also short you some coverage, so pay the extra couple of bucks and get a 125mm. For moderate climbs, the Mix will give you plenty of grip. The pure Nylon has the best grip, but the glide isn't quite as good as the mixed mohair. Make sure to watch the video from BD about trimming your skins:

http://www.blackdiamondequipment.com/en-us/shop/ski/skins

Hope that helps. Enjoy!

I would say get the 110s, but I might also recommend NOT going with a pure mohair if you are just going straight up and down, get a nylon mix or pure nylon.

Be a slow-shoer no more! BD Ascension or Glidelites are the standard to which all other skins are measured. I'm on my 4th season on the same glidelites, so nuff said. Make sure you get a skin with the tail attachment, no matter what. I would go with either all nylon or the mohair mix. As a rule, nylon is more durable, has better bite on steeper tracks, and will repel water/ice a bit better than mohair. Mohairs glide better, are lighter and pack smaller, and have been relegated to the domain of randonnnee racing as such. They will weigh a bit more than pure mohairs, but WAY less than snowshoes, either way. G3 skins are good, too, but some don't like the tip connection. Hope that helps.

Also, rule of thumb on skin sizing for everyone out there:
Take a ruler and measure the fattest part of the tail of your skis that will actually touch the snow. Buy the closest size that will cover this measurement. You can always go with the listed tail dimension, but they are less accurate than you would think. Your shovel never comes into play while skinning, and it's usually the widest part of the ski. There's no need to buy a super wide skin and then trim 30mm off of the whole thing unless you like wasting money.