Generally, it is difficult to know your right size when it comes to thermal underwear. There is a thumb rule that states you should always purchase thermals that are one size down from your loose-fitting underwear. Bodtek thermal underwear is designed to vary in different sizes accommodating a large population of people. Additionally, you are supposed to consider the type of weather during the day and night. For instance, when it gets hot and you had picked tighter or looser thermal underwear, you will feel uncomfortable.   
 
Comfortability
When you are considering the right size of thermal underwear, you should make sure they make you comfortable. Choose an attire that makes you feel confident with yourself. Bodtek thermal underwear is made of the right size and high-quality fabrics for comfortability.

Fabric
Bodtek thermal underwear is made of materials that can absorb and retain moisture accordingly. Whether you are skiing, going to the gym, seated at home, or going to work, you should have the right size for ease. Bodtek thermal underwear is specifically designed to suit your right size making you move freely.     
Confident
When you purchasing thermal underwear the right size is tight making you feel confident as you freely move, doing work, or are seated in the house. The wrong size of thermal will make you feel cozy and confident. Imagine walking around with thermal underwear that is extremely tight or loose. This will make you lose confidence when you are outdoors thus making you feel uncomfortable.  

Flexibility
The right size of thermal underwear should allow you to flexible as you can easily move around freely and confidently. Also, these thermals should fit if you are on the basketball court, in the office, or lazing around on the couch at home. Bodtek thermals are designed to make you comfortable and fit tightly. The thermals are made to fit tightly with your skin for comfortability. The thermals have unique features that allow you to have a good night's sleep and stay comfortable throughout the night. Also, the fabrics keep you dry, warm, and cozy all day and night.

Style
Nowadays, there are fashion trends that make you wear either extremely tight or loose thermal underwear in the name of fashion. Slowly, more people are adapting to this trend and you would look flashy when you purchase Bodtek thermal underwear as they come in different sizes. You will be able to choose the perfect fit for your style and liking.  

Purpose
Why do you need the right size of thermal underwear? In the fashion industry, an extreme loose or tight is considered a trend. This goes behind the thumb rule that states you should always purchase thermals that are one size down from your loose-fitting underwear. These trends are mostly used by models who are in the fashion industry business. Bodtek thermal underwear comes in various sizes to fit your taste and also serve its purposes.

Choose the right size considering the activities you do every day. If you like jogging, going to the gym, and other outdoor activities, you should pick thermal underwear that is elastic as they provide comfortable fitting.