• Protective Maxtex® 600 D outer shell for superior abrasion resistance
  • Armour compatible* (shoulders, elbows, back) - *sold separately
  • NEW Waterproof Humax® membrane (14,348mmH2O) and highly breathable (19,241g/m2/24 h)
  • Fully Seam Sealed construction
  • NEW SmartVent System - 5 x airflow vents
  • NEW Removable Thermoline® thermal lining
  • NEW Removable Wrist Gaiter design - attached to thermal liner
  • NEW Reflective logos
  • NEW Improved fit for optimal performance and comfort
  • NEW Removable hood with magnetic keeper
  • NEW Hidden key/fob clip in front pocket
  • Water resistant pockets with premium YKK® Aquaguard® zippers
  • 2-way YKK® Vislon® main zipper with storm flap - Easily adjust the bottom of the jacket depending on your riding position
  • Comfort lined collar, cuffs and hand-warmer pockets
  • Free express shipping for Australian customers

We’re proud to introduce the 4th generation our Alpha Jacket. Our best jacket, just got a whole lot better!

I know what you’re thinking… “what’s different compared to the old Alpha Jacket”? We’ve spent the past 2 years riding all over the world, taking notes of ‘all the small things’ that we could improve. More importantly, we listened to YOU. Your emails and reviews had some hidden clues on ways we could improve the design… and we’ve been paying attention.

We’ve stuck with the classic Protective Maxtex® 600 D outer shell for superior abrasion resistance. For added protection, we’ve designed the jacket to be 100% compatible with body armour inserts for the back, shoulders and elbows (sold separately). NEED ARMOUR? CLICK HERE.

Cold weather? We’ve improved the removable Thermoline® thermal liner, plus added built-in wrist gaiters to help block cold wind from entering your sleeves.

Warm weather? Zip-out that thermal lining and open the new SmartVentTM System (with a total of 5 zipper vents) for maximum air circulation, keeping you cooler.

With a total of 5 large pockets, you’ll have plenty of room to stash all your valuables on your next ride. We’ve added a magnetic keeper to the removable hood (to stop it flapping around), there’s a hidden key clip in the front pocket for your key/fob, reflective logos for extra visibility and premium YKK® zippers all round.

Built for the worst conditions – Fully seam sealed + our new Humax® membrane features a huge 14k Waterproof + 19k Breathability rating, resulting in the ultimate protection against rain, wind and snow. (14,348 mmH2O + 19,241 g/m2/24 h)

We’ve built the new Alpha Jacket to take you wherever you want to go. From mountain peaks, to city streets. Around town, or around the world. The Alpha 4.0 Motorcycle jacket is ready for it all.


The Alpha Jacket has ZERO stretch. We recommend that you choose a size that will fit 'loosely' on your body.

The best way to find out your size is to measure a jacket you already own, and that fits 'loosely' while on your bike (factoring in any garments you wish to layer underneath). Being a lot thicker than most other jackets this adds to the overall chest width of the jacket. We encourage customers to measure something that's a similar style (such as a snow or a thick technical jacket) as this will ultimately be the best comparison in chest width.

Measure by laying your jacket flat on a table, and measure the chest, making sure to go from side seam to side seam (near the armpit like in the photo below). It's very important that you reach the seam join on each side, even if you have to bend a little around the sides of the jacket. Compare your measurement to the size chart above.

If you're unsure of your size, please EMAIL US at, especially if you are an international customer. We are here to help and will do whatever we can to make sure you order the right size.

Model in the photos is 6ft, 83kgs, has a 100cm chest and is wearing a size Large.

Alpha Jacket How to Measure

Questions? Email us at You’ll be talking directly with someone who rides and has tested our gear. 

Customer Reviews

Based on 17 reviews
Joe Wyndham
Well considered design, quality finish

Just got out on my first ride this morning and it's simply the nicest jacket I've ever worn. It eliminates all wind chill, it's comfy and feels light on the ride. Everything on the jacket has obvious quality, the stitching, the zips, the buttons, the fabric. Can't wait to test it out on a longer highway ride.

Thanks for the awesome review Joe! We're stoked you love it!

Riley Cooper
Skin Saver

If you're considering this jacket, pull the trigger. Trust me, you won't regret it. There are so many things this jacket does well, its hard to leave a comprehensive review. But after a couple thousand miles and a crash, here is what I got:

Waterproof: No need to say more. I was caught in several storms and was dry everytime.
Comfortable: Its got weight to it, but isn't heavy or restricting.
Warm: The inner liner works splendidly and even without it, the jacket cuts wind beautifully.
Zippers: Excellent. Why doesn't every jacket come standard with a double zipper?! Akin gets it right. Durable, waterproof a d easy to use.
Features: For the price, a magnetic hood lock, a key ring, waterproof inner pockets, outer pockets, 5 zipped vents, and soft inserts at the neck and sleeves make it a steal.
Style: Its subjective, but also, its awesome.
Protection: I crashed! It was low speed and I was only a little beat up, able to walk away. This jacket however, saved the skin on my shoulder. Without it, I would've been picking rocks and cotton out of road rash. See the picture. The initial layer tore, but helped me slide, and it never made it through the second.

Nitpicks (because there really aren't cons): The ventilation is mostly just ok. Now, take my opinion woth a grain of salt though. I wear a chest pad underneath that blocks much of the breeze I would get through the chest. I also wear a backpack, which blocks much of the exhaust through the back vent. Its also nigh impossible to use the zipper on the back if you're already on the bike, but I don't know if there is even a design that would make my forgetfulness easier to manage.
The color: Its not pearlescent white. But again, I think this is kind of just a me thing. I still love the white, but its a bit muted in comparison to my gloss white helmet and motorcycle. Also, as you may imagine, a white jacket is a canvas for bugs, dirt, and road tar. You'll be handwashing it often.

Verdict: Get it. You won't regret it.

And as with all the other reviews, Grant is the best customer service guy I've ever dealt with. He answered my questions quickly and in detail and supported me after my crash. Akin is the gold standard of what motorcycle gear should be.

Riley, thank you for such a comprehensive and honest review! We're so incredibly stoked to hear you have walked away from your crash and to hear that the Alpha Jacket protected you during it.

Just epic A+

This jacket is perfection! You guys nailed it. Thank you.

Thanks for the purchase Luke, we're stoked that you love the jacket!

Minh Nguyen
Best jacket out there

I got this and its my favorite jacket I own. I wear an XL shirt and buying an XL it fit perfectly. Love the inclusion of the thermal liner even if I won't ever use it. Looks incredible with minimal branding. Jacket is lightweight and very protective. Definitely excited to see what they do next.

Thanks for such a thorough review! We're so stoked that you're loving the Alpha Jacket and that it fits perfectly! For any customers looking to find their perfect size we have a detailed size guide for the jacket, but we're always availble to guide you further on

Paul Adams
My New favourite Jacket

Great fit and really comfortable, you dont realise you have a jacket on. The sizing chart was perfect, size M, i'm 80kg and 175cm tall. Having a white jacket on certainly feels like you can be seen. All my gear now in AKIN, Love It.

We're so stoked to hear that your Alpha Jacket is your new favourite Paul, thanks for such an awesome review!