Alpinestars A-4 Plasma Chest Protector

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

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Alpinestars A-4 Plasma Chest Protector Engineered for the rigors of off-road endeavors, the A-4 Plasma Chest Protector stands out with its semi-rigid thermoplastic polyhedron front shield coupled with a Nucleon Plasma back protector. It emphasizes real-world application with a design that’s lightweight, breathable, and conforms to the rider’s body while ensuring exceptional defense against impacts. The front chest shield benefits from a geodesic polyhedron pattern that minimizes material usage while maintaining structural integrity, achieving superior strength with less material compared to flat surfaces. This ingenuity not only reduces weight but also enhances ventilation, yielding a chest protector whose parts synergize to exceed expectations. On the flip side, the Nucleon Plasma Back Protector is sculpted from a USDA Certified Biobased viscoelastic compound. It boasts adaptable flexibility, hugging the rider snugly and dissipating forces effectively during impacts. It guarantees extensive protection and cooling properties, fostering a safer and more focused off-road experience. Features: Lightweight and ultra-ventilated chest armor Constructed from USDA certified, biobased, eco-friendly and sustainable impact absorbing material Equipped with adjustable shoulder and side straps for an optimized performance fit Removable soft tactile thermoformed rib and shoulder padding for enhanced comfort Over-injected flexible side wings of the chest protector perfectly follow the body’s contours for superior comfort and freedom of movement Lining on the back protector offers a soft tactile feeling against the skin while maintaining the integral structure of the protectors and reducing the risk of any material tearing Lining is ribbed for superior airflow while also reducing the amount of material that is in contact with the skin Perforated 3D mesh chassis also offers additional protection against tire roost Bionic Neck Support compatibility via the BNS shoulder pull tabs situated on the removable soft tactile thermoformed shoulder pads Compatible with the Nucleon Plasma Extended Roost Coverage kit which includes upper and lower chest extensions and an additional Y-strap system, allowing you to use the A-4 Chest Protector without the back protector According to European statutory law, the CE mark is a conformity requirement for the marketing of this product. The following standards apply: Back protector: EN 1621-2:2014 LEVEL 1 Chest protector: EN 1621-3:2018 LEVEL 1

color

Black/Red/White

Size

MD/LG

XL-2XL