A full-face motorcycle helmet featuring a detailed black and white mechanical engine or gear pattern on the shell, with a black visor and a white lower chin bar.

A full-face motorcycle helmet with a detailed black and white industrial engine graphic printed across the visor, shown against a plain white background.

A full-face motorcycle helmet by Fly Racing, featuring a glossy black base with a subtle skull graphic pattern, light blue and gray graphic accents, and a clear visor.

A Fly Racing full-face motorcycle helmet in black with a dark gray graphic pattern, light blue accents, and a red stripe, shown against a plain white background.

A Fly Racing full-face motorcycle helmet in black with a subtle skull graphic pattern, featuring light blue and red graphics on the lower side, and a clear visor.

A full-face motorcycle helmet shown from the front, featuring a glossy black visor with a detailed grayscale industrial machinery graphic printed across the upper section.

A full-face motorcycle helmet featuring a black and gray technical schematic pattern with a bold yellow visor accent and a central black stripe.

A full-face motorcycle helmet shown from the front, featuring a glossy black visor with a detailed grayscale industrial engine or mechanical gear graphic printed across it.

Product Details

Designed for riders who spend their time on the street, the Fly Racing Sentinel Mech Helmet combines modern safety technology with practical features that enhance comfort on every ride. Whether you're commuting, touring, or enjoying weekend rides, the Sentinel provides dependable protection and convenience in a sleek full-face design.

A durable yet lightweight polycarbonate blend shell works with a dual-density EPS liner to help manage impacts while reducing rider fatigue. The optically correct clear face shield features anti-fog and scratch-resistant coatings for excellent visibility, while the internal drop-down sun shield provides instant glare protection with the flip of a lever. A secure shield locking system and tool-free shield replacement make daily use simple and convenient.

The removable Qwick-Dry® comfort liner wicks away moisture to keep you comfortable during long rides, while integrated speaker pockets make it easy to install most Bluetooth communication systems. A High-Flow ventilation system with multiple intake and exhaust vents promotes consistent airflow, and the removable breath deflector, chin curtain, and soft fleece helmet bag complete this feature-packed street helmet.

Whether you're navigating city traffic or heading out on a weekend adventure, the Fly Racing Sentinel Mech Helmet delivers the protection, comfort, and versatility riders expect.

Features

ECE Approved / D.O.T. Approved
Construction:
Durable and lightweight polycarbonate blend shell
Dual density EPS liner – two layers of EPS, one softer, one slightly harder combine to provide a more progressive impact absorption for different levels of impact
Vision:
Optically superior clear face shield with anti-fog coating and durable hard coating for scratch resistance
Tinted drop-down inner sun shield. 100% UVA/B protection up to 400 nanometers
Shield lock provides piece of mind
Easy shield changes quick, secure and tool less removal and installation
Comfort / Liner:
Qwick - Dry® comfort liner and cheeks pads. Hydrophilic liner absorbs sweat and is perforated to provide plenty of ventilation
Speaker pockets built into the EPS for Bluetooth/Comm systems
Removable, washable interior and removable chin curtain
Ventilation
High-Flow ventilation system, 6 adjustable intake vents, 5 exhaust vents
Removable breath deflector helps direct airflow upwards across the shield for fog free vision
Included:
Soft fleece helmet bag
Optional mirror & tinted shields available

Sizing Info

The Fly Racing Sentinel Mech Helmet features an intermediate oval head shape that fits most riders comfortably. It should fit snugly around your head without creating painful pressure points or excessive movement. Measure your head circumference and consult the Fly Racing size chart to choose the proper size. If you're between sizes, select the size that provides the most secure fit.

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Fly Racing Sentinal Mech Helmet (2026)

Name: Fly Racing Sentinal Mech Helmet (2026)
Brand: Fly Racing
Price: 239.95 USD
Availability: InStock

Brand: Fly Racing

Type: Helmet

$239.95

$239.95 ~~$239.95~~

Shipping calculated at checkout.

Available in stock (12)

Riding Styles

Commuting, Sport, Street, Touring

The Fly Racing Sentinel Mech Helmet delivers premium street performance with advanced protection, all-day comfort, and modern styling. Featuring a lightweight polycarbonate shell, integrated drop-down sun shield, and ECE 22.06 certification, it's built for confident riding on every journey.

Color: Black/White/Grey

Size: XS

XS SM MD LG XL 2XL

Fly Racing Size Charts

Street Jackets and Pants

Men's Jacket & Pants Size Chart

Standard Jacket

Size	S	M	L	XL	2XL	3XL	4XL
Sleeve	31-32"	32-33"	33-34"	34-35"	37"	37"	37"
Chest	34-35"	36-38"	40-42"	44-46"	48-50"	52-54"	56-58"

Tall Jacket

Size	M	L	XL	2XL	3XL
Sleeve	34½-35½"	35½-36½"	36½-37½"	39½"	39½"
Chest	36-38"	40-42"	44-46"	48-50"	52-54"

Standard Pants

Size	30	32	34	36	38	40
Waist	30½-32"	32½-34"	34½-36"	36½-38"	38½-40"	40½-42"
Inseam	29"	31"	32"	33"	33½"	34"

How to Measure for Fitment

Sleeve: Measure from the center of the spine at the base of the neck around the shoulder, over the elbow and down to the wrist.

Chest: Measure around the broadest part of the chest, 1-2 inches below the armpits.

Waist: Measure about 1 inch below the top of the pelvic bone.

Inseam: Measure down from the crotch to the top of the ankle bone.

Women's Sizing Chart

Jacket

Size	Sleeve	Chest	Waist
XS	28"	32"	24"
SM	29"	35"	27"
MD	30"	38"	29.5"
LG	31"	41"	32.5"
XL	32"	45"	36.5"
2X	33"	49"	40.5"
3X	33"	53"	44.5"
4X	33"	57"	48.5"

Pants

Alpha Size	Numeric Size	Waist	Inseam
XS	0-2	28-30"	32"
SM	3-4	31-33"	33"
MD	5-6	34-36"	33"
LG	7-8	36-37"	33"
XL	9-12	38-41"	34"
2X	13-16	42-46"	34"

How to Measure

Sleeve: Measure from the center of the spine at the base of the neck around the shoulder, over the elbow and down to the wrist.

Bust: Measure around the fullest part of the bust.

Waist: Measure around the narrowest part of the waist.

Hip: Measure around the body halfway between the belly button and the crotch.

Inseam: Measure down from the crotch to the top of the ankle bone.

Moto Racewear & Snow Apparel

Off-Road

Men’s Jerseys Size Chart

How to Measure

1. Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

2. Chest: Measure around the broadest part of the chest, 1–2 inches below the armpits.

Size	Sleeve	Chest
SM	31–32"	34–35"
MD	32–33"	36–38"
LG	33–34"	40–42"
XL	34–35"	44–46"
2X	37"	48–50"
3X	38"	52–54"
4X	38"	56–58"
5X	38"	60–62"

Women’s Jerseys Size Chart

How to Measure

1. Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

2. Bust: Measure around the fullest part of the bust.

3. Waist: Measure around the narrowest part of the waist.

Adult

Size	Sleeve	Bust	Waist
SM	29"	35"	25.5–26.5"
MD	30"	38"	27.5–28.5"
LG	31"	41"	30–31.5"
XL	32"	44"	33–35"
2X	33"	48"	37"

Youth Jerseys Size Chart

How to Measure

1. Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

2. Chest: Measure around the broadest part of the chest, 1–2 inches below the armpits.

Size	Sleeve	Chest
YS	20–21"	20–22"
YM	22–23"	24–26"
YL	24–26"	28–30"

Men’s Pants Size Chart

How to Measure

3. Waist: Measure about 1" below the pelvic bone.

4. Inseam: Measurement is actual pant inseam.

Size	Waist	Inseam	Over-Boot Inseam
28	28.5–30"	27"	31"
30	30.5–32"	28.5"	31.5"
32	32.5–34"	30"	32"
34	34.5–36"	30"	33"
36	36.5–38"	31"	34"
38	38.5–40"	31"	34"
40	40.5–42"	31"	34"
42	42.5–44"	31"	34"
44	44.5–46"	31"	34"
46	46.5–48"	31"	34"
48	48.5–50"	31"	34"

Women’s Pants Size Chart

How to Measure

3. Waist: Measure around the narrowest part of the waist.

4. Hip: Stand with your feet together and measure around the fullest part of your hips.

5. Inseam: Measurement is actual pant inseam.

Women’s Size	Men’s Size (Reference)	Waist	Inseam	Hip Max
0/2	28	26"	27"	36.5"
3/4	30	27"	28"	37.5"
5/6	32	28"	29"	38.5"
7/8	34	29"	30"	39.5"
9/10	36	30"	30"	40.5"
11/12	38	31"	30"	42"
13/14	40	32"	30"	44"
15/16	42	33"	30"	46"
17/18	44	34"	30"	48"
19/20	46	35"	30"	50"

*Cross reference to men’s size is approximate fit in comparison. Women’s pants are shaped differently than men’s to fit the female body, so there are fitment differences between men’s and women’s.

Youth Pants Size Chart

How to Measure

Hip: Stand with your feet together and measure around the fullest part of your hips.

Inseam: Measurement is actual pant inseam.

Youth

Size	Inseam	Waist
20	20"	22"
22	21"	23"
24	23"	24"
26	25"	25"

Snow

Men’s Snow Jackets Size Chart

How to Measure

1. Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

2. Chest: Measure around the broadest part of the chest, 1–2 inches below the arm pits.

Size	Sleeve	Chest
SM	31–32"	34–35"
MD	32–33"	36–38"
LG	33–34"	40–42"
XL	34–35"	44–46"
2X	37"	48–50"
3X	37"	52–54"
4X	37"	56–58"

Women’s Snow Jackets Size Chart

How to Measure

1. Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

2. Bust: Measure around the fullest part of the bust.

3. Waist: Measure around the narrowest part of the waist.

Size	Bust	Waist
XS	28"	24"
SM	29"	27"
MD	30"	29.5"
LG	31"	32.5"
XL	32"	36.5"
2X	33"	40.5"
3X	33"	44.5"
4X	33"	48.5"

Youth Snow Jackets Size Chart

How to Measure

1. Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

2. Chest: Measure around the broadest part of the chest, 1–2 inches below the arm pits.

Size	Sleeve	Chest
YXS (6–8)	21–23"	24–26"
YS (9–11)	23–25"	26–29"
YM (12–14)	25–27"	29–31"
YL (14–16)	27–29"	32–33"

Men’s Snow Pants Size Chart

How to Measure

3. Waist: Measure about 1" below the top of the pelvic bone.

4. Inseam: Measure down from the crotch to the top of the ankle bone.

Size	Waist	Inseam	Notes
XS	28.5–30"	29"
S	30.5–32"	30"
M	32.5–34"	31"
MT	32.5–34"	35"	SNX Only
L	34.5–36"	32"
LT	34.5–36"	36"	SNX Only
XL	36.5–38"	32.5"
XT	36.5–38"	36.5"	SNX Only
2X	38.5–40"	32.5"
3X	40.5–42"	32.5"

Aurora Adult Bib: Short adjustment position decreases length by 2.5". Tall adjustment position increases length by 2.5".

Women’s Snow Pants Size Chart

How to Measure

3. Waist: Measure around the narrowest part of the waist.

4. Hip: Measure around the body halfway between the belly button and the crotch.

5. Inseam: Measure down from the crotch to the top of the ankle bone.

Alpha Size	Numeric Size	Waist	Hip	Inseam
XS	0–2	28–30"	34–36"	32"
SM	3–4	31–33"	37–38"	33"
MD	5–6	34–36"	39–40"	33"
LG	7–8	36–37"	41–42"	33"
XL	9–12	38–41"	43–46"	34"
2X	13–16	42–46"	47–50"	34"
3X	17–20	48–50"	51–54"	34"
4X	21–24	52–54"	55–58"	34"

Youth Snow Pants Size Chart

How to Measure

3. Waist: Measure about 1" below the top of the pelvic bone.

4. Inseam: Measure down from the crotch to the top of the ankle bone.

Size	Waist	Inseam
YS (6–8)	24–26"	22"
YM (10–12)	26–28"	24"
YL (14–16)	28–30"	26"

Aurora Youth Bib: Tall adjustment position increases length by 2.5".

Street, Moto, & Snow Gloves

Glove Size Chart

How to Measure

Hand Measurement: Measure at the widest part of your palm, just below the knuckles.

Fit	S	M	L	XL	2XL	3XL	4XL
Men’s	2¾"	3¼"	3¾"	4¼"	4¾"	5¼"	5¾"
Women’s	2¼"	2¾"	3¼"	3¾"	4¼"	4¾"	5¼"

Street, Moto, and Snow Helmets

PROPER FIT

To find your approximate size use a soft tape measure. Start at your forehead approximately one inch above your eyebrows and across the largest portion of the back of your head. Cross reference this measurement on the helmet size chart to determine the approximate size.

If you do not have a soft measuring tape, use a string or phone charging cord in the same way. Then lay it down and measure with a ruler.

Adult Helmet Size Chart

How to Measure

Measure around your head using a soft sewing tape or string. Start approximately one inch above your eyebrows and measure around the largest part of the back of your head.

Size	Inches	Centimeters
XS	21–22"	53–55 cm
S	22–23"	55–57 cm
M	23–24"	57–59 cm
L	24–25"	59–61 cm
XL	25–26"	61–63 cm
2XL	26–27"	63–65 cm
3XL	27–28"	65–67 cm

Youth Helmet Size Chart

How to Measure

Measure around your head using a soft sewing tape or string. Start approximately one inch above your eyebrows and measure around the largest part of the back of your head.

Size	Inches	Centimeters
YS	18–19"	47–49 cm
YM	19–20"	49–51 cm
YL	20–21"	51–53 cm

Boots

Boot Sizing Chart

US Size	Euro Size	UK Size	Inside Length (inches)	Inside Length (cm)
7	40	6.5	9.625"	24.4
8	41	7.5	9.9375"	25.4
9	42	8.5	10.25"	26
10	43	9.5	10.5625"	27
11	44	10.5	10.9375"	27.9
12	45	11.5	11.25"	28.6
13	46	12.5	11.5625"	29.4
14	47	13.5	11.875"	30.2

Protection

Barricade Size Chart

How to Measure

Sleeve: Measure from the center of the spine at the base of the neck, around the shoulder, over the elbow and down to the wrist.

Chest: Measure around the broadest part of the chest, 1-2 inches below the armpits.

Long Sleeve

Size	Sleeve	Chest
SM	33"	34-35"
MD	33 3/4"	36-38"
LG	34 1/2"	40-42"
XL	35 1/4"	44-46"
2XL	35 3/4"	48-50"

Short Sleeve

Size	Sleeve	Chest
SM	18 1/2"	34-35"
MD	19 1/8"	36-38"
LG	19 1/2"	40-42"
XL	19 7/8"	44-46"
2XL	20 1/4"	48-50"

Youth Size Chart

Size	Sleeve	Chest
YTH	26"	26-28"

Knee & Elbow Pads Size Chart

How to Measure

A. Thigh: Measure 4" above the kneecap.

B. Calf: Measure around the widest point.

C. Bicep: Measure around the widest point.

D. Forearm: Measure 5-6" below the elbow.

Knee Pads

Size	Thigh	Calf
SM	15-17"	12-13.5"
MD	17-19"	13.5-15"
LG	19-21"	15-16.5"
XL	21-23"	16.5-18"

Elbow Pads

Size	Bicep	Forearm
SM	8-10"	7.5-8.5"
MD	10-12"	8.5-9.5"
LG	12-14"	9.5-10.5"
XL	14-16"	10.5-12"

Free Shipping over $75
Free Returns Within 45 days

Product Details

Features

ECE Approved / D.O.T. Approved
Construction:
Durable and lightweight polycarbonate blend shell
Dual density EPS liner – two layers of EPS, one softer, one slightly harder combine to provide a more progressive impact absorption for different levels of impact
Vision:
Optically superior clear face shield with anti-fog coating and durable hard coating for scratch resistance
Tinted drop-down inner sun shield. 100% UVA/B protection up to 400 nanometers
Shield lock provides piece of mind
Easy shield changes quick, secure and tool less removal and installation
Comfort / Liner:
Qwick - Dry® comfort liner and cheeks pads. Hydrophilic liner absorbs sweat and is perforated to provide plenty of ventilation
Speaker pockets built into the EPS for Bluetooth/Comm systems
Removable, washable interior and removable chin curtain
Ventilation
High-Flow ventilation system, 6 adjustable intake vents, 5 exhaust vents
Removable breath deflector helps direct airflow upwards across the shield for fog free vision
Included:
Soft fleece helmet bag
Optional mirror & tinted shields available

Sizing Info

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Fly Racing Sentinal Mech Helmet (2026)

$239.95

$239.95 ~~$239.95~~

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Product Details

Features

Sizing Info

Fly Racing Sentinal Mech Helmet (2026)