Featured
Women
- Featured
  - New Arrivals
  - Base Layer Best Sellers
- Collections
  - All Seasons
- Sale
- Base Layers
- Clothing
  - Fleece
  - Short Sleeves
  - Long Sleeves
  - Hoodies
  - Bottoms
- Accessories
  - Face Masks
  - Neck Gaiters
- Socks
- Activity
  - Ski
  - Snowboard
  - Cross Country Skiing
  - Hiking
  - Trail Running
  - Camping
  - Biking
  - Rock Climbing
  - Fishing
  - Kayaking & SUP
  - Everyday
Men
- Featured
  - New Arrivals
  - Base Layer Best Sellers
- Collections
  - All Seasons
- Sale
- Base Layers
- Clothing
  - Fleece
  - Short Sleeves
  - Long Sleeves
  - Hoodies
  - Bottoms
- Accessories
  - Face Masks
  - Neck Gaiters
- Socks
- Activity
  - Ski
  - Snowboard
  - Cross Country Skiing
  - Hiking
  - Trail Running
  - Camping
  - Biking
  - Rock Climbing
  - Fishing
  - Kayaking & SUP
  - Everyday
Kids
- Featured
  - New Arrivals
  - Base Layer Best Sellers
- Sale
- Accessories
  - Neck Gaiters
- Girls Base Layers
  - Tops
  - Bottoms
- Girls Clothing
  - Fleece
  - Tops
  - Bottoms
  - Toddler Sets
- Boys Base Layers
  - Tops
  - Bottoms
- Boys Clothing
  - Fleece
  - Tops
  - Bottoms
  - Toddler Sets
- Socks
- Activity
  - Ski
  - Snowboard
  - Hiking
  - Fishing
  - Camping
  - Everyday
Discover
- About Us
- Layer Up, Let Loose

Fit and Care

Hot Chillys has an athletic and close-to-body without feeling restrictive.

Trim / performance fit – designed to sit close to the skin for moisture-wicking and layering
Comfort stretch – moves with you, not tight like compression gear
True-to-size for most – but slightly more fitted than casual apparel
Layer-friendly – thin enough to sit cleanly under mid-layers without bunching

Base Layer Fit Types

Illustration of human figures (man, women, and youth) wearing a Hot Chillys type base layer, demonstrating a close, body-contouring fit intended for layering without bulk

Body Fit Base Layers

Body Fit delivers a streamlined, next-to-skin feel. It contours closely to the body for maximum thermal efficiency and moisture management. Ideal as a base layer, it provides warmth without added bulk and is designed to move seamlessly under midlayers and outerwear.

Shop Body Fit

Illustrated figures of a man, woman, and youth wearing Hot Chillys base layers with an active fit, designed to contour to the body while allowing full range of motion

Active Fit Base Layers

Active Fit is built for movement. It offers a closer, body-skimming silhouette that follows your shape without restricting mobility. Designed for high-output activity, it reduces bulk, layers easily, and stays comfortably in place during skiing, running, training, or any cold-weather performance use.

Shop Active Fit

Drawing of a man, woman, and youth in Hot Chillys base layers, depicting a relaxed fit with extra room through the legs, torso and sleeves for comfort and easy movement.

Relaxed Fit Base Layers

Relaxed Fit offers easy comfort with more room to move. It provides a looser silhouette that doesn’t cling to the body, making it ideal for everyday wear, casual layering, or lower-intensity activities where comfort and breathability are key.

Shop Relaxed Fit

Hot Chillys Size Charts

Men's Tops Size Chart

Men's tops size chart showing chest measurements in inches and centimeters.
Measurement	S	M	L	XL	XXL
Chest (in)	35–37	38–40	42–44	46–48	50–52
Chest (cm)	89–94	95–101	102–112	113–122	123–132

Men's Bottoms Size Chart

Men's bottoms size chart showing waist measurements in inches and centimeters.
Measurement	S	M	L	XL	XXL
Waist (in)	29–31	32–34	36–38	40–42	44–46
Waist (cm)	74–79	80–86	87–96	97–106	107–117

Men's Sock Size Chart

Men's sock size chart showing US and EU shoe size equivalents by sock size.
Sock Size	M	L	XL
US Shoe Size	6–8½	9–11½	12–14
EU Shoe Size	36–42	42–46	47–50

Women's Tops Size Chart

Women's tops size chart showing US size, chest measurements in inches and centimeters.
Measurement	XS	S	M	L	XL
Size (US)	0–2	4–6	8–10	12–14	16–18
Chest (in)	32–33	34–35	36–37	38½–40	42–44
Chest (cm)	81–84	85–89	90–94	95–101	102–112

Women's Bottoms Size Chart

Women's bottoms size chart showing US size, waist, and hip measurements in inches and centimeters.
Measurement	XS	S	M	L	XL
Size (US)	0–2	4–6	8–10	12–14	16–18
Waist (in)	25–26	27–28	29–30	31–34	35–37
Waist (cm)	63–66	67–71	72–76	77–84	85–94
Hips (in)	34½–35½	36½–37½	38½–39½	40–42½	44½–46½
Hips (cm)	87–90	91–95	96–100	101–108	109–118

Women's Sock Size Chart

Women's sock size chart showing US and EU shoe size equivalents by sock size.
Sock Size	S	M	L
US Shoe Size	4–7	7–9½	10–12
EU Shoe Size	30–36	36–42	42–46

Youth Size Chart

Youth size chart showing size, height, and waist measurements in inches and centimeters.
Measurement	XXS	XS	S	M	L	XL
Size (Age)	3–4	4–6	6–8	8–10	12–14	14–16
Height (in)	40–42	43–47	48–52	53–56	57–60	61–64
Height (cm)	101–108	109–121	122–133	134–143	144–153	154–163
Waist (in)	21½–22½	22½–23½	23½–25	25–26½	26½–28	28–30
Waist (cm)	54–57	57–60	60–63	63–67	67–71	71–76

Toddler Size Chart

Toddler size chart showing height and weight ranges in inches, centimeters, pounds, and kilograms.
Measurement	2T	3T	4T
Height (in)	32–35	36–39	40–43
Height (cm)	81–90	91–99	101–109
Weight (lbs)	27–31	32–35	36–40
Weight (kg)	12½–14	14½–16	16½–18

Youth Sock Size Chart

Youth sock size chart showing Little Kids and Big Kids sizes with US and EU shoe conversions.
	Little Kids		Big Kids
Size	XS	S	M	L
Sock Size	5–6½	6–8	7–9	9–11
US Shoe Size	6–8½	9–13	13–4	4–7
EU Shoe Size	22–25	26–30	30–36	36–29

Mask Size Chart

Mask size chart showing hat size ranges and head circumference measurements for youth and adult sizing.
Measurement	Youth S/M	Youth L/XL	Adult S/M	Adult L/XL
Hat Size	6 – 6½	6½ – 6⅞	6⅞ – 7¼	7¼ – 7¾
Head Circumference (in)	20 – 20¾	20¾ – 21¼	21¼ – 22¾	22¾ – 24¼

Washing Instructions

Machine wash separately on cold with like colors. Tumble dry low. Do not iron.

Wash before wearing. Wash between uses.

Do not use bleach or fabric softeners. Bleach may harm the material and fabric softeners reduce the moisture wicking ability and actually make it harder to wash out sweat and body odor in an althetic garment.

Any detergent residue that is meant to stay on the fabric like brighteners or scents will reduce the effectiveness of Hot Chillys moisture wicking properties.

Cart (0)

Don't forget these...

End of season sale