HJC i31 Helmet

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

Grey

Matte Black

Size

Clear

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HJC i31 Helmet The HJC i31 Helmet merges safety features and rider comfort with practical design elements. Constructed with an advanced polycarbonate composite, the helmet is lightweight yet durable. The i31 features an aerodynamically crafted 3D shield which enhances stability when riding at higher speeds. Visibility is both clear and adaptable, courtesy of a Pinlock-ready HJ-43 face shield paired with an integrated HJ-V12 sun shield that responds to varying lighting situations. The helmet is engineered with the ACS Advanced Channeling Ventilation System that integrates one intake and a pair of exhaust vents to maintain comfortable head temperatures. Inside, the moisture-wicking MultiCool interior provides both comfort and a quicker drying time, along with grooves to accommodate riders who wear eyeglasses. Ease of maintenance is assured with the Rapidfire shield replacement system and a dependable nylon strap retention system. The i31 helmet meets DOT standards, assuring riders of its reliable protective performance for their journeys. Features: Advanced polycarbonate composite shell Pinlock Ready HJ-43 face shield ACS Advanced Channeling Ventilation System 1 intake and 2 exhaust vents HJ-V12 integrated dark smoke sun shield MultiCool moisture wicking and quick dry interior Aerodynamic 3D shield design Rapidfire shield replacement system Nylon strap retention system Grooves for eyeglass wearers DOT certified

color

Black

Grey

Matte Black

Size

2XL