Picture two people fishing on the banks of a river. They seem to be wearing identical clothing. However, after an hour of fishing, the first person, shivering with cold, has stopped fishing and left the spot. The other person, perfectly comfortable, continues on fishing and enjoys his outing to the very end. He "keeps on going".

What is the difference between the two?
The prepared fisher has taken the temperature into account. He is wearing Restigouche underclothing, sweater and long johns, which are the base layer of his clothing and which allow him to conserve his body heat while evacuating his perspiration, even while staying outdoors for several hours. Stretchy, light and insulating, Restigouche underwear is especially agreeable to wear.

Note the opening for the thumb at the end of the sleeve which helps keep it warm and ensures that the sleeves don't ride up.

Characteristics:
-Power Stretch fabric which breathes;
-YKK brand zippers;
-Quarter length zipper in front with a chin protector;
-Rounded lower back;
-Opening for the thumb at end of sleeves.