Good quality, but they are a tight fit for a large helmet.
Love the helmet. Fits great and is an amazing deal for the price. Will be buying another just like it for my wife.
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Choosing the right size ensures proper protection and comfort.
How to Measure:
Wrap a soft measuring tape around the largest part of your head — just above the eyebrows and ears. Match your measurement to our sizing chart.
Fit Notes:
A proper helmet should feel snug at first. Padding will naturally break in after a few rides. If the helmet moves easily when you shake your head, size down.
Head Shape:
GDM helmets are designed for intermediate‑oval head shapes for secure, comfortable fit.
The GDM DEMON Full Face Motorcycle Helmet is engineered for riders who want maximum protection, aggressive styling, and dependable performance on every ride. As a DOT FMVSS‑218 approved full face motorcycle helmet, the DEMON delivers complete head coverage and impact protection for street, highway, and daily commuting.
With its full‑coverage design, the DEMON provides 100% head protection, shielding riders from impacts, debris, and harsh weather conditions. This makes it one of the most reliable full face motorcycle helmets for riders who prioritize safety without sacrificing comfort or style.
The aerodynamic shell is constructed using an advanced lightweight composite poly‑alloy, designed to reduce wind drag while maintaining exceptional durability. This material helps the DEMON remain lightweight, comfortable, and stable at high speeds — a key advantage for riders searching for a lightweight full face motorcycle helmet.
Inside, the helmet features a hypo‑allergenic and antimicrobial nylon liner, along with removable and washable cheek pads. This interior keeps riders cool, clean, and comfortable, making the DEMON ideal for long rides and warm‑weather conditions.
The DEMON includes a flush‑fit, side‑coverless face shield that is:
This ensures clear visibility and eye protection — essential features riders look for in a high‑quality full face motorcycle helmet.
With chin, rear, and forehead vents, the DEMON’s 5‑point ventilation system provides steady airflow throughout the helmet. This helps reduce fogging, regulate temperature, and maintain comfort during long rides.
The Double D‑Ring chin strap offers a secure, race‑ready fit trusted by riders worldwide. It keeps the helmet firmly in place, enhancing safety and stability.
A protective clearcoat finish shields the helmet’s matte black paint from scratches, UV rays, and everyday wear — keeping your helmet looking sharp ride after ride.
The GDM DEMON is designed in the USA and manufactured in Vietnam with strict quality standards. Riders get a premium full face motorcycle helmet built for real‑world performance and long‑term durability.
Every DEMON helmet ships with:
This gives riders flexibility for different lighting conditions and a convenient way to store or transport their helmet.
DOT Certified (FMVSS 218):
All GDM helmets meet or exceed DOT requirements for impact absorption, penetration resistance, and retention system strength.
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.
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, typically within 1 business day.
Delivery Estimates:
Standard U.S. shipping usually arrives in 3–5 business days depending on location.
Free Return Shipping (USA):
U.S. customers receive free return shipping on eligible returns. A prepaid label is provided once the return is approved.
Return Eligibility:
Items must be in new, unused condition with all original packaging.
International customers are responsible for return shipping costs.
For full details, see our Return & Refund Policy.
Every GDM helmet comes with:
Some models may include additional accessories depending on design and configuration.
Frequently asked questions
Some questions and answers are automatically generated.

Customers praised the stylish design and comfortable fit. Reviews noted "100 percent saved me" during an accident, highlighting safety. Included visors are a bonus. However, concerns about wind noise at high speeds, padding quality, and loose visor mechanism were mentioned. Some felt build quality was lightweight. Great value for budget-conscious riders.
My boyfriend was going over 70mph and hit a curb after splitting and rolled. He caught air twice and slid about 10ft after the second come down. He injured his shoulder and ankle while also has a concussion but it could have been extremely worse. Thankful for this helmet more than I can explain.
Great fit, ventilation is amazing!! Definitely a great purchase. Thanks GDM!!!
Fits amazingly and looks amazing would buy again
AMEN
Me quedó genial
Looks cool
Helmet comes in box with 2 addition visors. (tinted and the color you picked) Helmet looks badass, think it's supposed to be a knock off avg pista rr. The padding is pretty bad and build quailty feels cheap. My biggest complaint is the wind noise. If you're upright it's pretty loud but doable. When you full tuck and wind gets into the top vents, it's literally, like LITERALLY deafening. I'd say you're paying for looks and wouldn't be bad for low speed city commutes lol 🤷🏾
Es un buen casco, no es la gran cosa porque por el precio no puedes exigir mucho, funciona perfecto, único detalle que cuando vas muy rápido puedes escuchar como se filtra el aire a través del visor ( no es súper sellado ) pero por el precio está súper bien
Love using this and at first I thought I got the wrong size until I actually push my head through inside.
for the price this was a great buy. super stoked on how it looks, comfortable, cancels noise beautifully. solid package here. i get a lot of compliments on it too, bought the iridium chrome visor to go with it and i couldn’t be happier with this helmet.
Very good quality .
Muy buena calidad !!contento con este producto, el servicio al cliente muy atento
I have a shoie and bought this just to have something extra (just in case). I’d prefer quality, it’s amazing how much a good helmet can change the ride. Don’t cheap out on helmets it looks cool though! Fast shipping and came with a lot of stuff
Helmet is awsome I would recommend but if I may add, the helmet lacks a visor locking mechanism that would definitely make the helmet not only safer but more comfortable knowing it’s clamped down when it feels it could just fly up at speed ect.Aside from that this helmet is amazing, out of 10 I’d rate it a solid 7 or 8/10
Great first helmet. Looks cool. Scratches easy, visors are cool. Nice design. Catches wind when you turn your head. I got a medium and it’s tight, but I have a big head.
Not bad as far as quality but kinda flimsy. Would be much better with thicker padding,the did send additional padding but got used to it being a little on the loose side.
Looks and fits great but there’s this annoying whistle noise due to slight spacing in the helmet I’m guessing. Makes me want to throw it off mid right. But overall not bad
Straps slightly ripped when I first tried on, other than that pretty solid could use a extra vent to keep from fogging
the helmet is well built and fits well the shown gold visor is not the one that comes with the product it is more shiny / iridescent orange gold colored.
Ecxelente casco recomendado!
Cosmetically amazing helmet, when I picked it up the first time I was sketched… the helmet is super light compared to most…. I didn’t feel totally safe with it in… I have a skinny face and it wiggled a little left and right. I literally just ordered a small patch of memory foam and added it to open spaces and it fits perfect. I recommend saving and dropping extra dollars on a safer more known helmet but this is definitely a steal if you need a good looking helmet on a budget.
If I purchased the incorrect Size for the helmet, am I able to return it for the correct size ?
Yes. Returns/Exchanges are accepted within 30 days of delivery.
Does the GDM DEMON FULL FACE MOTORCYCLE HELMET have the slots for speakers in I install Bluetooth in it like is it Bluetooth ready
Yes. It is Bluetooth ready. It does have pockets/ cutouts inside for speakers.
Is this helmet able to have a Sena attached
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.
Good quality, but they are a tight fit for a large helmet.
light weight android finish
Love the helmet. Fits great and is an amazing deal for the price. Will be buying another just like it for my wife.