Moisture Transfer Fibers – Hot Chillys® exclusive MTF technology moves moisture away from your body, keeping you warm, dry, and comfortable.

4-Way Stretch Fabric – Fabric hugs your body and moves with you, eliminating extra bulk, providing a full range of motion, and improving performance.

Bio-Silver® – Bio-Silver® anti-microbial treatment uses state of the art technology with intimately blended yarns to prohibit odor-causing bacteria. This fabric incorporates non-abrasive, soft-feeling yarns with permanent, silver-based properties to help trap and eliminate body odor. Bottom line: Silver naturally prevents body odor from scaring away the wildlife around you.

Set-in collar for style and comfort

Slight drop tail for easy layering

8K – The term 8K refers to the 14 peaks in the world that are over 26,000 feet, or 8,000 meters, in elevation. These are the highest peaks in the world, and as the aligned goal for 8K is to offer the highest peak of performance for base layer, the name was fitting.

Rated 8 / 10 for Warmth – Products with a warmth factor between 6 and 8 are some of our most popular medium warmth, midweight products designed for excellent moisture management and slightly greater warmth. Great for cold conditions and perfect for performing with you all day on the mountain.

Features 8K flocked logo

Flat seam construction to reduce bulk and skin abrasion

Contrast flat seam construction

UPF 30+ protection

Machine wash in cold water on the delicate cycle. Tumble dry on low and remove promptly. Do not bleach or iron.