Finding the right base layers
What are base layers for?
- Base layer is how you stay dry, warm, and in the zone. It's the secret to staying comfortable in all cold and cool weather activities.
What's on your agenda?
- Hot Chillys are made to handle a wide range of temperatures and our tech is built to withstand different levels of moisture and activity without skipping a beat.
What are you getting into?
- Sporty type? More action (try a body fit) means you'll need less warmth from your base layer. Laid back? Chiller vibes and less movement may require warmer layers.
How chilly do you get?
- Whether you're the one huddling by the fire fully bundled (try Warmth 10) or the bold spirit sporting shorts when it's 40 (try Warmth 7), it's good to know your cold tolerance.
What is gsm?
- GSM, or grams per square meter, is the weight, in grams of a meter of material. A typical thought is that the more a material weighs, the warmer it will be. This is partially true, a heavier fleece will feel warmer than it's lighter cousin since it has more room to trap warm air.
If you think about it in extremes, a pound of feathers would keep your warmer than a pound of rocks.
Your garment is keeping you warm by keeping warm air near your body and by wicking moisture away from your skin, not only by weighing more on a scale.
In fact, you will feel warmer in our Bi-Ply, since it has two layers of material that trap warm air, than in our Pepper Skins, which is heavier by weight.
What's your comfort fit?
- Do you like a snug body fit that moves with you, or maybe a chillaxed relaxed fit is more your thing. If you are not sure, try Clima-Tek for more casual activities or Micro-Elite Chamois for more sporty activities.
Fabric Features
Four Way Stretch
Hugs your body and moves with you—no extra bulk, improved performance.
Mechanical Stretch
Engineered to roll with your movement, providing all over warmth and expedited moisture management.
Moisture Transfer Fibers
Keeps you dry, warm and comfortable with our exclusive MTF technology enabled by hydrophobic yarns that move moisture away from your body.
Ultraviolet Protection Factor
UPF ratings indicate how much of the sun's UV radiation a fabric can block. Higher numbers block more UV rays.
Technology
Bio-Silver
Bio-Silver™ is a permanent, silver-ion based technology that helps prevent the growth of odor-causing bacteria on fabrics. Each fiber is infused or finished with microscopic silver particles that release ions when moisture and heat are present — the same conditions that cause odor. These ions disrupt bacterial cell activity, effectively stopping odor before it starts.
Far Infrared Technology
Far Infrared (FIR) yarn is engineered with ceramic or mineral-infused fibers that absorb your body’s natural heat and re-emit it back as gentle infrared energy. This process helps stimulate micro-circulation, improve warmth retention, and enhance muscle recovery—all without adding weight or bulk.
Graphene Fiber Weave
Graphene Fiber Weave blends ultra-conductive graphene particles into the fabric structure to deliver exceptional heat management, durability, and comfort. Known as one of the strongest and most thermally efficient materials on Earth, graphene helps your body maintain an ideal temperature—dispersing heat when you’re warm and retaining it when you’re cold.
Activated Carbon
Activated Carbon Fabric integrates microporous carbon particles into the fibers or fabric coating to deliver powerful odor absorption and moisture management. The high surface area of activated carbon traps and neutralizes odor molecules, keeping garments fresher for longer—even during extended wear or high-intensity activity.
Odor Control
Odor Control Fabric is engineered with advanced antimicrobial or odor-neutralizing technology that targets the root cause of odors: bacteria and microbes that thrive on sweat and moisture. Unlike masking fragrances, this fabric actively inhibits odor formation, keeping garments fresher throughout your day or activity —guaranteed for 20-30 washes.
La Montana
- Micro-denier polyester fibers for lighter weight, luxurious drape, breathability, warmth without added bulk, strength and durability
- MTF polyester moisture transfer fibers for increased moisture management
- Micro-Elite Chamois panels with Bio-Silver® for freshness
- Micro-Elite Chamois panels provide an active fit design with freedom of movement
- UPF 40 +
- Active Fit
- 100% Polyester Fleece
- 200 gsm
- In Adult and Youth Sizing
Micro-Elite XT
- Durable outer with soft, brushed fleece backing
- 4-way stretch fabric for a next to skin body fit
- MTF nylon moisture transfer fiber for increased moisture management
- Highly breathable knit
- Smooth face for easy layering
- Wind resistant
- UPF 40 +
- Active Fit
- 90% Nylon, 10% Spandex
- 260 gsm
- In Adult Sizing
Micro-Elite Chamois
- Intimate blend of enhanced polyester and spandex fibers
- Moisture Transfer Fibers to move moisture away from the skin
- 4-way stretch for unlimited movement
- UPF 30 +
- Body Fit
- 89% Polyester, 11% Spandex
- 265 gsm
- In Adult and Youth Sizing
Clima-Tek
- Ultimate high-flexibility and casual comfort
- Moisture Transfer Fibers to move moisture away from the skin
- 4-way stretch for unlimited movement
- Antimicrobial properties for odor control
- UPF 30 +
- Relaxed Fit
- 86% Polyester, 14% Spandex
- 180 gsm
- In Adult Sizing
MTF4000
- Soft, comfortable MTF poly/spandex blend
- 4-way stretch for unlimited movement
- UPF 30+
- Relaxed Fit
- 84% Polyester, 16% Spandex
- 180 gsm
- In Adult sizing
Originals
- Moisture Transfer Fibers to keep you dry
- Body fit design for next to skin performance fit
- Easy, comfortable feeling
- UPF 30+
- Body Fit
- 92% Polyester, 8% Soandex
- 220 gsm
- In Youth Sizing
Pepper Bi-Ply
- MTF Moisture Transfer Fibers for moisture management
- Spun polyester is slightly brushed for extra softness
- Double layer traps air between layers for extra warmth
- Flat seam construction for seam strength and longevity
- Versatile for sports or everyday warmth needs
- UPF 30+
- Relaxed Fit
- 100% Polyester
- 160 gsm
- In Adult and Youth Sizing
Peach Skins
- 100% Microfiber Polyester makes it light for layering
- Moisture Transfer Fibers to move moisture away from the skin
- Antimicrobial treatment to inhibit bacteria growth
- Anatomically designed shape with room to move
- Soft, silky hand feel makes it easy to layer over
- UPF 30+
- Relaxed Fit
- 100% Polyester
- 110 gm
- In Adult and Youth Sizing
Pepper Skins
- MTF Moisture Transfer Fibers for moisture management
- Spun polyester is slightly brushed for extra softness
- Flat seam construction for seam strength and longevity
- Versatile for sports or everyday warmth needs
- UPF 30+
- Relaxed Fit
- 100% Polyester
- 175 gsm
- In Adult and Youth Sizing
Winter Sport Socks
- Hot Chillys Low Volume socks are engineered for high performance boots where there is no room for bulky socks. These winter sport socks are made with densely knit cushioning on the shin, foot bed and heel/toe are for extra protection and comfort. Knit of soft blended yarns.
- Mid Volume are for those who want performance with extra warmth. These warm base layer socks for winter have all the same features of the Low Volume sock, but with a slightly thicker yarn.
- Fiesta socks are Mid Volume and speak for themselves with custom designed vibrant prints, patterns, bright colors and coordinated collections to fit every personality. All are designed to our highest standards of quality.
