The asymmetric and lightweight design ensures the Bionic Flex Knee Protector provides optimal levels of comfort and freedom of movement.

Key Features

Highly convenient and time-saving slip-on design with elasticated hems and silicon printing to prevent slippage and to help keep the protector securely positioned.
New design Nucleon Flex Technology protectors are highly perforated and secured on the outside of the sleeve for excellent breathability and ventilation.
Additional side foam padding for additional coverage.
Abrasion resistant fabric front panel for increased durability.

Protection

Knee Protector - En 1621-1:2012 Level 1.

Construction

Extremely lightweight, durable and flexible protector constructed from a breathable stretch mesh for a comfortable, close fit.
Elasticated top strap for a customizable fit.

Manufacturer Part No. (MPN): 8059175286964
Barcode: 8059175286964

Age:	Adult
Colour:	Black/Red
Model:	Bionic Flex
Size:	S/M
Type:	Knee Protector

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.

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.

Be the first to review Bionic Flex Knee Protector Black Red - Size S/M. Write a review

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.