This form fitting base layer keeps you warm whether you are shoveling snow, riding a horse, motorcycling, sledding, camping, biking, running or skiing outside in cold weather. They are excellent at retaining body heat, soft, stretchy for longer legs and wick away moisture. They can even be worn around the house when you’re lounging around.

Hot Chillys keep you warm and look good under clothing

Made from a polyester/Lycra blend, these long underwear pants are constructed with flat seams and maintain a flattering fit under clothing including fitted ski pants. Even though the layer is thin, they deliver a lot of warmth.

Hot Chillys Construction means they last!

Fitted triple needle covered elastic waistband means that it’s not coming apart any time soon. I had a pair for 15 years and just replaced mine because one of my teens took them.

Notice the nylon at the bottom of the chillys starting a few inches below the knee and through the stirrup. This is great for pulling socks over and offers a bit more stretch for those who need it. This keeps them from pulling down.

For Nordic and Alpine skiers, the lycra stirrup bottoms are a must-have feature. The stirrups are totally smooth at the boot-foot pressure points, making these a comfortable and flexible base layer.

Women’s and Men’s have a diamond gusset cotton crotch and they are made from Bio-Silver antimicrobial yarns to control body odor. We really can't say enough about this underlayer. And fortunately they have not "over improved" them over the years but maintained the standard of quality they set over a decade ago.