Key Features

Highly flexible Nucleon Plasma Back Protector: Constructed from viscoelastic material engineered from bio-based polymers and formed into a structure that is pliable in all directions while maintaining the ability to dissipate impact energies.

Lightweight and highly ventilated, this protector offers strong impact force dispersion and absorption while ensuring maximum coverage area in all riding positions.

Lightweight and ultra-vented chest armour: The chest outer shell â„¢s design is based on geodesic polyhedrons, and like a geodesic dome, less material is needed to achieve the desired structural strength and imposed load performance when compared to flat or unfaceted surfaces.

This results in a protector where the whole is greater than the sum of all its parts, making the new A-4 Plasma Chest Protector supremely light-weight and ventilated.

The over-injected flexible side wings of the chest protector perfectly follow the body â„¢s contours for superior comfort and freedom of movement.

Optional Race kit: Engineered to be compatible with the Nucleon Plasma Extended Roost Coverage kit which includes Upper and Lower Chest Extensions, and an additional Y-Strap System to use the A-4 Chest without the back protector.

Rib and shoulder coverage: A-4 Plasma Chest Protector features highly perforated, adjustable and detachable rib and shoulder padding for additional coverage against roost and impact.

Construction

Equipped with adjustable shoulder and side straps for an optimised performance fit.
Removable soft tactile thermoformed shoulder padding for enhanced rider comfort.
The 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.
The lining is ribbed for superior airflow while also reducing the amount of material that is in contact with the skin.
The perforated 3D mesh chassis also offers additional protection against tire roost.
Bionic Neck Support compatibility via the BNS shoulder pull tabs.
USDA certified bio-based eco-friendly and sustainable impact absorbing material.

Protection

Back protector: EN 1621-2:2014 LEVEL 1

Chest protector: EN 1621-3:2018 LEVEL 1

Manufacturer Part No. (MPN): 8059347564821
Barcode: 8059347564821

Colour:	Black/Red/White
Model:	A-4 Plasma
Size:	XL/XXL

Product FAQs
- Where can I download product Safety Data Sheets (SDS)?

Product FAQs

Where can I download product Safety Data Sheets (SDS)?

Safety Data Sheets (SDS) can be downloaded from the 'Downloads' tab on a product page. When not available, please contact us or refer to the manufacturers website linked to at the bottom of each brand page.

Alpinestars MX27 Catalogue

Delivery

Regular Delivery Costs & Times

Trade

Standard Delivery

Orders will be despatched as follows: To business addresses only; £9.95 (Exc VAT) delivery charge (subject to change depending on account level); Free delivery with net order values of £100 and over (Exc VAT) to the UK Mainland; Orders to N. Ireland/Eire/Isle of Man/Scilly Isles by arrangement; other destinations phone for details; Typical delivery times of 1-2 working days.

Where possible, the Company will endeavour to meet special delivery requirements subject to any additional cost being borne by the Purchaser

Unfortunately, we do not delivery to addresses outside of mainland UK without prior agreement. Without prior agreement you may place an order for Products from outside the UK, but this order must be for delivery to an address in mainland UK unless arranged otherwise prior to your order.

All third party deliveries will carry a charge, the minimum charge will be £9.95 (Exc. VAT).

Pallet Charges

Larger items may incur additional carriage charges, including but not limited to 4x4 and SUV tyres.
An overview of charges per pallet for each region is available to view here: https://www.google.com/maps/d/viewer?mid=11ydN7ZJNHKHf9Ygd0ih_L6-U1dMq31A

Consumer

Click & Collect Only

Select a collection point from our network of available dealers. You will be notified by the chosen dealer once your order is ready to collect, estimated time is 2-3 days (depending on national holidays and dealer opening hours).
Any returns will be handled by the collection point.

Free for orders over £100
£11.95 fee for orders below £100

Read our full delivery policy here

Returns

Trade

Please complete the Trade Returns form or contact our Sales Office

Consumer (Click & Collect)

Your click and collect location will handle any returns for you. Please contact the original collect point/dealer to discuss returns and ensure the item is returned to that location..
Alternatively, please use the Returns form.

If you experience issues when attempting to contact the collection point/dealer, please contact us.

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ALPINESTARS SIZE CHARTS

Men's: MX Boots, Touring Boots, Gloves, Protection Jackets, Chest Protectors, Elbow Protectors, Knee Protectors, Bionic Knee Brace, Kidney Belts, Socks
Women's: MX Boots, Gloves, Protection Jackets
Youth: MX Boots, Protection Jackets, Kidney Belts

MENS SIZE CHART

Men's MX Boots - Excluding Tech 10

Tech 7, Tech 5, Tech 3

EU SIZE	38	39	40.5	42	43	44.5	45.5	47	48	49.5	51	52
US SIZE	5	6	7	8	9	10	11	12	13	14	15	16
JPN SIZE	24	25	25.5	26.5	27.5	29	29.5	30.5	31.5	32.5	33.5	34.5
SHOES INSIDE LENGTH (CM)	25.1	25.9	26.8	27.6	28.5	29.3	30.2	31.00	31.9	32.7	33.6	34.4
SHOES INSIDE LENGTH (INCHES)	9.88	10.19	10.55	10.86	11.22	11.53	11.88	12.20	12.55	12.87	13.22	13.54
COMFORT SIZE (CM)	24.3	25.1	26.0	26.8	27.7	28.5	29.4	30.2	31.1	31.9	32.8	33.6
COMFORT SIZE (INCHES	9.56	9.88	10.23	10.55	10.90	11.22	11.57	11.88	12.24	12.55	12.91	13.22

Compare the measurement (in cm) of the longest part of the foot using the table above.
Cross reference this value against the "SHOES INSIDE LENGTH".
Then, from this column, check whether the measured length of the foot is greater than the value of the corresponding "COMFORT SIZE".
If the measured length of your foot in the "SHOW INSIDE LENGTH" is less than the same columns "COMFORT SIZE", then you will have the correct shoe size to order.

A. SHOES INSIDE LENGTH
Example SIZE 9 (28.5cm / 11.22 inches)

B. COMFORT SIZE
Example SIZE 9 (27.7cm / 10.90 inches)

Men's MX Boots - Tech 10 Only

Tech 10 - It is advisable to use the size higher in Tech 10 due to the inner boot. For example size 9 in Tech 10 is the same length as a size 8 in Tech 7

EU SIZE	40.5	42	43	44.5	45.5	47	48	49.5
US SIZE	7	8	9	10	11	12	13	14
JPN SIZE	25.5	26.5	27.5	29	29.5	30.5	31.5	32.5
SHOES INSIDE LENGTH (CM)	25.9	26.8	27.6	28.5	29.3	30.2	31.00	31.9
SHOES INSIDE LENGTH (INCHES)	10.19	10.55	10.86	11.22	11.53	11.88	12.20	12.55
COMFORT SIZE (CM)	25.1	26.0	26.8	27.7	28.5	29.4	30.2	31.1
COMFORT SIZE (INCHES	9.88	10.23	10.55	10.90	11.22	11.57	11.88	12.24

Men's Gloves

eg. Full Bore

INTERNATIONAL SIZE	XS	S	M	L	XL	XXL	3XL (XXL)
MENS HAND CIRCUMFERENCE (INCHES)	N/A	7½ - 8	8 - 8½	8½ - 9	9 - 9½	9½ - 10	10 - 11
MENS HAND CIRCUMFERENCE (CM)	N/A	17.8 - 20.3	20.3 - 21.6	21.6 - 22.9	22.9 - 24.1	24.1 - 25.4	25.4 - 27.9

Measure hand circumference without thumb

Men's Protection Jackets

SIZE	XS	S	M	L	XL	2XL (XXL)
CHEST (CM)	82 - 90	90 - 96	96 -101	101 - 108	108 - 112	112 - 118
WAIST TO SHOULDER (CM)	38 - 43	38 - 43	43 - 48	43 - 48	48 - 51	48 - 51
HEIGHT (CM)	157 - 166	166 - 173	173 - 178	178 - 185	185 - 190	190 - 195
CHEST (INCHES)	32½ - 35½	35½ - 38	38 - 39⅓	39⅓ - 42½	42½ - 44	44 - 46½
WAIST TO SHOULDER (INCHES)	15" - 17"	15" - 17"	17" - 19"	17" - 19"	19" - 20"	19" - 20"
HEIGHT (FEET)	5'2" - 5'5"	5'5" - 5'8"	5'8" - 5'10"	5'8" - 5'10"	6'0" - 6'3"	6'0" - 6'3"

Chest - Measure around the fullest part, under the armpits, keeping the tape horizontal.
Waist - Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
Height - Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

Men's Chest Protectors

SIZE	XS / S	M / L	XL / 2XL (XXL)
CHEST (CM)	82 - 96	96 -108	108 - 118
WAIST TO SHOULDER (CM)	38 - 43	43 - 48	48 - 51
HEIGHT (CM)	157 - 173	173 - 185	185 - 198
CHEST (INCHES)	32½ - 38	38 - 42½	42½ - 46½
WAIST TO SHOULDER (INCHES)	15" - 17"	17" - 19"	19" - 20"
HEIGHT (FEET)	5'2" - 5'8"	5'8" - 6'1"	6'1" - 6'3"

Chest - Measure around the fullest part, under the armpits, keeping the tape horizontal.
Waist - Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
Height - Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

Men's Elbow Protectors

SIZE	S / M	L / XL
UPPER ARM (CM)	23 -29	29 -35
LOWER ARM (CM)	20 - 28	28 -34
UPPER ARM (INCHES)	9 - 11½	11½ - 13⅓
LOWER ARM (INCHES)	8 - 11	11 - 13½

Measure at the widest muscle circumference

Men's Knee Protectors

SIZE	S / M	L / XL
UPPER LEG (CM)	39 - 45	45 -50
LOWER LEG (CM)	32 - 38	38 - 43
UPPER LEG (INCHES)	15 - 17⅓	17⅓ - 19¾
LOWER LEG (INCHES)	12 - 15	15 - 17

Upper leg circumference: Measure 10cm/4" above the centre of the kneecap
Lower leg circumference: Measure at the widest part of the calf

Bionic Knee Brace

SIZE	S	M	L	XL / 2XL (XXL)
WIDTH (CM)	10.6 - 11.4	11.4 -12.2	12.2 - 13	13 - 13.8
WIDTH (INCHES)	4¼ - 4½	4 - 4¾	4 - 5¼	5¼ - 5½

Measure kneecap width at the centre

Men's Kidney Belts

SIZE	XS / L	XL / 4XL (XXXXL)
WAIST (CM)	70 - 94	94 - 116
WAIST (INCHES)	27½ - 37	37 - 45½

Waist - Measure around the natural waist line, inline with the navel, keeping the tape horizontal.

Men's Socks

2 Size Options (e.g. Knee Brace, MX Socks Long)

SOCK SIZE	S / M	L / XL
US SIZE	6 - 9	9.5 - 13.5
EU SIZE	38 - 42	42.5 - 47.5

3 Size Options (e.g. MX Pro, MX Plus)

SOCK SIZE	S	M	L
US SIZE	6 - 8	8.5 - 10.5	11 -13
EU SIZE	38 - 40.5	41 - 43.5	44 - 47

4 Size Option

SOCK SIZE	S	M	L	XL
US SIZE	5 - 6.5	7 - 8.5	10 - 11.5	12 - 13.5
EU SIZE	37 - 38.5	39 - 41	43 - 45	45.5 - 47.5

WOMENS SIZE CHART

Women's Footwear

EU	37	38	39	41	42
US	6	7	8	9	10
JPN	23	24	25	26	26.5

Women's Gloves

eg. Stella Full Bore

INTERNATIONAL SIZE	XS	S	M	L	XL	2XL (XXL)	3XL (XXL)
WOMENS HAND CIRCUMFERENCE (INCHES)	6½ - 7	7 - 7½	7½ - 8	8 - 8½	8½ - 9
WOMENS HAND CIRCUMFERENCE (CM)	16.5 - 17.8	17.8 - 19	19 - 20.3	20.3 - 21.6	21.6 - 22.9

Women's Protection Jackets

SIZE	S	M	L
CHEST (CM)	86 - 90	90 - 94	94 -98
WAIST TO SHOULDER (CM)	38 - 43	38 - 43	43 - 48
HEIGHT (CM)	169 - 172	172 - 176	178 - 180
CHEST (INCHES)	33⅓ - 35½	35½ - 37	37 - 38½
WAIST TO SHOULDER (INCHES)	15" - 17"	17" - 19"	17" - 19"
HEIGHT (FEET)	5'6" - 5'8"	5'8" - 5'9"	5'9" - 5'10"

Chest - Measure around the fullest part, under the armpits, keeping the tape horizontal.
Waist - Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
Height - Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

YOUTH SIZE CHART

Youth MX Boots

Euro	28	29	30.5	32	33	34	35.5	37	38	39	40.5	42
US	10J	11J	12J	13J	1	2	3	4	5	6	7	8
JPN	17.5	18.5	19.5	20	21	21.5	22.5	23	24	25	25.5	26.5

Youth Jackets - Body Armour

SIZE	S / M	L / XL
YEARS	6 - 8	9 - 12
CHEST (CM)	60 - 70	70 - 80
WAIST TO SHOULDER (CM)	30 - 35	35 - 40
HEIGHT (CM)	120 - 140	140 - 160
CHEST (INCHES)	23½ - 27½	27½ - 31½
WAIST TO SHOULDER (INCHES)	11⅓ - 13⅓	13⅓ - 15⅓
HEIGHT (FEET)	3'11" - 4'7"	4'7" - 5'3"

Chest - Measure around the fullest part, under the armpits, keeping the tape horizontal.
Waist - Measure around the natural waist line, inline with the navel, keeping the tape horizontal.
Height - Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

Youth Kidney Belts

SIZE	S / M	L / XL
YEARS	6 - 8	9 - 12
WAIST (CM)	60.5 - 70.5	70.5 - 80.5
WAIST (INCHES)	21½ - 24½	24½ - 27½

Waist - Measure around the natural waist line, inline with the navel, keeping the tape horizontal.

Sizes provided as a reference guide only. Please check the manufacturers website for the latest size guides.