Cold More Condition_symptoms How Can I Become More Tolerant To Cold Weather?

How can I become more tolerant to cold weather? - cold more condition_symptoms

I like the cold and I'm very tolerant with them. If the temperature in the 40s, I wear a T-shirt and jeans and I feel good. But many of my friends wear shirts and trembled violently. How can I increase tolerance to cold than I do? I really want to shock people around me do not feel the cold, if your in the 20s.