HEATTECH Ultra Warm T-Shirt | High Neck

Size chart

Clothing Size Conversion Chart
Category	US	EU	UK	Chest (in)	Waist (in)	Hips (in)
Men	XS	44	34	32-34	26-28	33-35
	S	46	36	34-36	28-30	35-37
	M	48	38	38-40	32-34	39-41
	L	50	40	42-44	36-38	43-45
	XL	52	42	46-48	40-42	47-49
Women	XS	32	6	31-32	24-25	33-34
	S	34	8	33-34	26-27	35-36
	M	36	10	35-36	28-29	37-38
	L	38-40	12-14	37-39	30-32	39-41
	XL	42	16	40-42	33-35	42-44
Youth	XS	128	7	26-28	23-24	26-28
	S	134	8	28-30	24-25	28-30
	M	140	10	30-32	25-26	30-32
	L	146	12	32-34	26-27	32-34
	XL	152	14	34-36	27-28	34-36

Pants Size Conversion Chart
Category	US	EU	UK	Waist (in)	Hip (in)	Inseam (in)
Men	28	44	28	28	34	30
	30	46	30	30	36	31
	32	48	32	32	38	32
	34	50	34	34	40	33
	36	52	36	36	42	34
Women	0	32	4	24	34	30
	2	34	6	25	35	30
	4	36	8	26	36	31
	6	38	10	27	38	32
	8	40	12	28	40	32

Shoes Size Conversion Chart
Category	US	EU	UK	Foot Length (in)
Men	6	39	5.5	9.25
	7	40	6.5	9.625
	8	41	7.5	10
	9	42	8.5	10.25
	10	43	9.5	10.625
	11	44	10.5	11
	12	45	11.5	11.25
	13	46	12.5	11.625
Women	5	35	2.5	8.5
	6	36	3.5	8.875
	7	37	4.5	9.25
	8	38	5.5	9.625
	9	39	6.5	10
	10	40	7.5	10.25
	11	41	8.5	10.625
	12	42	9.5	11
M (Unisex)	5	37	4.5	8.75
	6	38	5.5	9
	7	39	6.5	9.5
	8	40	7.5	10
	9	41	8.5	10.25
	10	42	9.5	10.625
	11	43	10.5	11
	12	44	11.5	11.25

color

BLACK

DARK GRAY

GRAY

NAVY

OFF WHITE

Size

Clear

Description

– The ultimate thermal base layer, even in the most extreme cold.
– Ultra Warm is 2.25 times* warmer than our regular HEATTECH. Updated fabric with a smooth, brushed feel. *Based on CLO values, which measure clothing’s thermal resistance. Comparison with standard ‘HEATTECH’.
– High-performance fabric with Heat Absorption, HEAT RETENTION, and moisture-wicking comfort features.
– A warm layer with a fluffy, brushed lining.
– Stretch fabric allows easy movement even when layered.
– Warm, high neck with a comfortable fit.

Compare 3 Types of ‘HEATTECH’ Fabric:

‘HEATTECH’
– Lightweight yet warm, ideal for everyday layering.
– Recommended for 41 °F to 68 °F for mild winter days or cozy indoor wear.

‘HEATTECH’ Extra Warm
– About 1.5× warmer than original ‘HEATTECH’, offering added insulation without bulk.
– Perfect for colder days with recommended temperatures from 23 °F to 59 °F.

‘HEATTECH’ Ultra Warm
– Our warmest option, approximately 2.25× warmer than original ‘HEATTECH’.
– Designed for more extreme cold with a recommended range of –4 °F to 50 °F.

Additional information