Despite my best interests you guys have got me interested. BUT! I have a few questions:

1. I am 5'2" and a size 4- which size is for me?
2. what is the deal with 3/4 tights- why not the full length
3. are tehy warm? I live in Minnesota and like to ski- but freeze my butt off u nless it is polypropylene and then some on these gams (please note the picture).
4. are tehy uncomfortable to wear on a random day? or are they sports only tights?