It fits great! Changing out the face shields is a little challenging...but I know it will be safe. I love that I can talk to my husband while we ride now!
Good quality, but they are a tight fit for a large helmet.
10% OFF YOUR ORDER! USE CODE "SAVE10"
FREE U.S. SHIPPING ON ORDERS OVER $99
FREE U.S. RETURNS & EXCHANGES
You save $15 (6% off)
Couldn't load pickup availability
The GDM DEMON Bluetooth Motorcycle Helmet with 4 Shields is the complete DEMON kit: the DOT FMVSS-218 certified DEMON full face helmet, the GDM HyperSonic Bluetooth 5.0 headset and 4 face shields for every kind of light. Take calls, stream music through the helmet speakers, hear GPS directions and talk rider-to-rider over the intercom, all hands-free.
Shop all Bluetooth motorcycle helmetsShop all full face motorcycle helmets
The DEMON's aerodynamic full face shell is made of lightweight composite poly-alloy and finished with an aggressive rear spoiler. It's DOT FMVSS-218 certified for street, highway and daily commuting. A double D-ring chin strap with a strap holder keeps it secure, and a clearcoat finish protects the matte black paint.
Five points of ventilation at the chin, forehead and rear keep air moving through the helmet. The hypoallergenic, antimicrobial nylon liner and cheek pads are removable and washable, so the helmet stays fresh on long rides.
The included GDM HyperSonic Bluetooth 5.0 headset gives the DEMON helmet speakers, a microphone and an intercom, all controlled with a single button:
HiFi stereo speakers and a wind-resistant, noise-canceling microphone keep calls clear at speed. The intercom works with another GDM HyperSonic headset: add a GDM HyperSonic motorcycle Bluetooth headset to your passenger's or riding partner's helmet.
The flush-fit, side-coverless face shields are optically correct, compound-curved, scratch resistant and block UV rays. All four come in the box:
See our shield replacement guide for how to swap shields.
GDM helmets run true to size. Every adult GDM helmet uses the same sizing.
| Size | Head (cm) | Head (inches) | Hat size |
|---|---|---|---|
| S | 55–56 | 21 5/8–22 | 6 7/8–7 |
| M | 57–58 | 22 1/4–22 7/8 | 7 1/8–7 1/4 |
| L | 59–60 | 23 1/4–23 5/8 | 7 3/8–7 1/2 |
| XL | 61–62 | 24–24 3/8 | 7 5/8–7 3/4 |
| 2XL | 63–64 | 24 3/4–25 1/4 | 7 7/8–8 |
Find my size · See the full size chart
Wrong size? Exchanges are free within 30 days in the U.S.
DOT Certified (FMVSS 218):
All GDM helmets meet or exceed DOT requirements for impact absorption, penetration resistance, and retention system strength. Every GDM helmet carries the DOT label on the back of the shell.
What DOT certification means
Shell & Liner:
Durable outer shell paired with a multi-density EPS liner engineered to manage impact energy.
Visibility:
Designed to meet federal peripheral vision requirements for safe street riding.
See all DOT approved motorcycle helmets · How to spot a fake DOT helmet
Helmet Care
Keep your GDM helmet in top condition:
1‑Year Limited Warranty
Most GDM helmets include a 1‑Year Limited Warranty covering manufacturing defects in materials, components, and workmanship.
Wear‑and‑tear, cosmetic damage, accidents, impacts, and misuse are not covered.
To start a claim, email our support team with your order number and photos of the issue. Claims are reviewed within 2–3 business days.
Fast Processing:
Orders ship from our Los Angeles warehouse the same day or within 1 business day.
Free U.S. Shipping:
Free standard shipping on U.S. orders over $99 (lower 48 states). Standard U.S. shipping usually arrives in 3–5 business days, depending on location.
30-Day Free Returns & Exchanges (USA):
You have 30 days after receiving your item to request a return. U.S. customers get free return shipping: once your return is approved, we email you a prepaid return label. Need a different size? Return the one you have and place a new order. U.S. exchanges also get free return shipping.
Return Eligibility:
Items must be unworn and unused, in new condition, with all original packaging. International customers are responsible for return shipping costs.
How to Start a Return:
Log in to your account, go to "My Orders" and choose "Request a Return". Checked out as a guest? Email info@ridegdm.com.
For full details, see our Return & Refund Policy.
Your GDM DEMON Bluetooth helmet with 4 shields comes with:

I checked out a bunch of Bluetooth helmets before buying this one, and honestly, it ended up being the best deal by far — great price, great performance. I saw some people complaining about the jog dial and the audio quality, but that hasn’t been my experience at all. The dial works exactly the way the instructions explain, and the sound is actually really good. I like my music loud, and I still had to turn it down a bit. The helmet comes loaded with features: calling, speed‑dial options, easy Bluetooth pairing — everything connected without any hassle. Overall, I’m really happy with it and would definitely recommend it.
It’s comfortable, fits my head well (I tried an XL first and ended up exchanging it for this size), isn’t too heavy, and comes with a solid set of features. The vents can be opened or closed, though I honestly don’t notice much difference. I get plenty of airflow from under the chin anyway, and I rarely use the removable chin curtain unless it’s really cold. The tinted drop‑down visor is one of my favorite features. I can ride with the clear visor open and still have eye protection and airflow as long as it’s not dark out — a really nice touch. The Bluetooth system works well overall. Every now and then it won’t connect to my phone, but cycling the helmet off and on fixes it. Once connected, it’s flawless. I wear earplugs to cut engine noise and can still hear the speakers clearly at highway speeds. Battery life has been excellent too — easily over eight hours per charge.
Fits really well. I’m a big fan of the drop‑down sun visor — super handy. The audio’s solid, and the helmet itself looks good and feels like it’s built right. My only gripe is the instructions… they’re pretty vague, so I’ve just been figuring things out as I go. For the price, though, it’s a solid deal. I’m giving it 4 stars instead of 5 just because the directions could’ve been clearer.
My speakers aren’t working, they are plugged in and the speaker is charged. Not sure what to do
Make sure the speaker/mic wire are fully and firmly plugged into the unit. It may take some force pushing it in the first time. It should produce sound.
The GDM DEMON lineup offers three distinct versions for different riders. Here's how the Full Face, Bluetooth Intercom, and HYPERSONIC models compare so you can choose the right one.
The GDM DEMON lineup offers three distinct versions for different riders. Here's how the Full Face, Bluetooth Intercom, and HYPERSONIC models compare so you can choose the right one.
Bluetooth motorcycle helmets range from about $100 to well over $1,000. Here's what you get at each price, whether to buy a helmet and headset together or separately, and the...
Bluetooth motorcycle helmets range from about $100 to well over $1,000. Here's what you get at each price, whether to buy a helmet and headset together or separately, and the...
The best Bluetooth motorcycle helmets for calls, music, GPS and rider-to-rider intercom, from full face to modular, dual sport and retro, plus what to look for before you buy.
The best Bluetooth motorcycle helmets for calls, music, GPS and rider-to-rider intercom, from full face to modular, dual sport and retro, plus what to look for before you buy.
It fits great! Changing out the face shields is a little challenging...but I know it will be safe. I love that I can talk to my husband while we ride now!
Good quality, but they are a tight fit for a large helmet.
light weight android finish
It exceeded my expectations, I really like to recommend 100%.
Love the helmet. Fits great and is an amazing deal for the price. Will be buying another just like it for my wife.
Fits nice comfortable to wear. Got three lenses with mine. Easy swap out. Fogs easy need to apply some good anti fog spray I used magic worked good. Bluetooth works better than expected honestly. I have road most the day on same charge with gps and music playing non stop. Phone calls work great.
I have only used motocross helmets and recently picked up a dual sport. I wanted a helmet that looked sharp for on and off the highway. I was going to get the bell Mx-9 that looks similar but I love the way this one looks better. It looks futuristic Halo type. Fits great, cancels out the wind way better than I'm used to, and it looks great. For the price, you can't beat it. 100% but it again.
Package arrived earlier than delivery date. Very Comfortable, good visibility and quieter than I expected. I have installed the dark shield that came with the package and plan to buy a mirrored one as well. For the price this was an awesome deal.