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Assos iJ.haBu.5 Jacket - Men's


Item # AAS001T

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Item # AAS001T

A jacket that backs up its name.

There's a breaking point when the weather gets cold enough that thermal jerseys alone don't provide enough warmth. The Assos iJ.Habu.5 Men's Jacket is designed to take you beyond that barrier. It wears with the weight and feel of a jersey and is ideally used over one of Assos' three different Interactive Base Layers to vary the total effect of its warmth. The critical design detail that gives the iJ.Habu.5 Jacket the potential to keep you warm into seriously chilly weather is the Stratagone windproof material that Assos places across the front, down the arms, and over the shoulders.

The rest of the jacket is made with Roubaix Q fabric. It's warm and fuzzy, and it's a lighter weight version of their typical Roubaix material. The difference is the waffle pattern of its fleecy backside. This reduces the weight of the fabric and increases its compressibility without affecting the insulative qualities. As a result, the iJ.Habu.5 can still be crammed into a jersey pocket should you get lucky and get some afternoon sunshine and warm roads.

The Stratagone windproof material has a generous four-way stretch to accommodate your layers. On the inside, it has a light mesh to facilitate moisture movement so you stay as dry as possible. In high wear areas, like over the spine and inside the windproof collar, Assos laminates another lightweight mesh to protect the base materials from abrasion and in the case of the collar, to keep you comfortable.

TheAssos iJ.Habu.5 Jacket is available in Black, Red, and White and it comes in six sizes from Small to TIR. On the back, you'll find three standard pockets and two zippered pockets for secure storage, a feature you'll appreciate if you've ever stashed your phone in a jacket pocket only to take it off when you got too warm and been unlucky enough to hear your phone slide out of its berth as you pulled your arms free. It also has reflective elements along each zipper on the back and up the front of the jacket.

  • A winter cycling jacket for dedicated training
  • Fabric composition means high protection and low volume
  • Balances elemental resistance with breathability
  • Three rear pockets provide storage space for accessories
  • Two zippered security pockets for personal effects
  • Reflective details help keep you visible in low-light conditions
  • Assos' obsessive attention to details surfaces here in cold-weather style

Tech Specs

41% polyamide, 21% polyester, 16% polypropylene, 14% elastane, 8% polyurethane
3 rear, 2 rear zip
Recommended Use:
Manufacturer Warranty:

Size chart


Men's Apparel
Leg & Knee Warmers 0 I II
Height 4ft 11in - 5ft 2in
(150 - 159cm)
5ft 3in - 5ft 6in
(160 - 169cm)
5ft 7in - 5ft 10in
(170 - 179cm)
5ft 11in - 6ft 1in
(180 - 185cm)
6ft 1in - 6ft 3in
(186 - 190cm)
6ft 3in - 6ft 5in+
(191 - 195cm+)
XLG but wider
Arm Warmers 0 I II
Chest 35.4in
46.5+ in
How to Measure:
For best results, take measurements over your underwear.
Measure around the widest part of your chest.

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great stuff

    i wear size S Jersey from Assos (and all other brands), and got a size M for this jacket and fits perfectly as I really use it as a jacket but NOT a long sleeve jersey. I carry my phone, wallet, food, small-tool-bag in my jersey, and this jacket goes on top. This jacket cuts slim, but not as slim as the Castelli Gabba Jersey (2nd version) or Rapha Pro Team Soft Shell Jacket (2015 version).
    Thickness is on the lighter side, but does block wind decently. I live and use this in Southern California.

    I'm 5'11


    • Fit: True to size

    I wear mostly Assos apparel and I own a pair of HaBu5 jackets which I have a fair amount of miles on. The previous review by MWS is spot on from my experience with the i.J.Habu5 jacket. You may want to consider a few more details about the HaBu5, considering it's a fairly expensive item...

    The fit is typical Assos, "very" snug, body hugging and comfortable on the bike but not comfortable off the bike. The HaBu is designed and cut for a trim, fit athletic body type. It's definitely NOT a good choice if you have a less than trim, fit body and you will probably feel very uncomfortable wearing this jacket. This is not a casual, roomy, club fit jacket! Also, some cyclists may not like the rear pockets on this jacket because they are a bit unique...The side pockets are only zippered and they do not have traditional style slip-in open pockets. The center pocket is open but it's not very large. You can fit a lightweight pack-able wind/rain jacket (150g) in the center pocket, but it's tight. The sleeve openings are also designed to be close fitting to your wrist, as a result, they can be a struggle to fit your hands through when putting on or removing the jacket, especially if you have large hands.

    Overall, I think the HaBu5 is a beautiful stylish looking piece with exceptional Assos quality. It's designed for temps in the 40's to low 60's. With a winter LS baselayer, I'm comfortable down to around 37 degrees with moderate winds. The front exposure is essentially windproof, the back fabric breaths very well and it's relatively light weight for a mid-winter jacket.

    FYI; 5'8.5", 160lbs, 32" waist, 41" chest. Wear size L in HaBu.

    Avg. ride time: 50m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    Great jacket (jersey?) for mild winters

    • Familiarity: I've used it several times

    I find the best way to think about this jacket is as heavy long-sleeve jersey. As other users have pointed out, it fits like a jersey and doesn't leave a lot of room for excess layering. For San Francisco bay area "winters", I find that this is all the jacket I need. With this jacket and a good base layer, you're good to the low 40s. To that end, I'd say that Assos is fairly spot on with their climate range of Early Winter 5 on this piece (

    Fit wise, I'm 6'1", 160lbs and fit of the medium is spot on. I wouldn't want it to be any larger, and in typical Assos fashion, it feels little odd until you're actually riding your bike; when you're hanging around the coffee shop it's going to pull a bit across your chest.

    The only strike against it (and it's a stretch) is that zipping this jacket up tends to be a two-handed operation. The flap behind the zipper that prevents drafts has a tendency to get caught when attempting a one-handed zip up. This makes the jacket a 4-assos stars garment, which would be 5 stars for any other brand.

    Nicely made but watch the sizing

    • Familiarity: I returned this product before using it

    Assos makes the best garments for cycling in my opinion. I wish I had started with them instead of wasting money on lesser brands and constantly trading up but that is life. This garment in particular is sized tight, skin tight, wetsuit tight, sausage tight... get my meaning? I'm a large across the board but this jacket left no room to breathe or wear a jersey underneath so unless you want a fit more akin to a full body skinsuit go up a size. I decided to return it since going up a size would have made it too long and its too much money to spend to not have it fit perfectly.

    It may be, as w/ Arc'teryx, that one has to adapt to, accept the pattern/design rather than expecting a bespoke garment.

    One of the best pieces I own

    • Familiarity: I've put it through the wringer

    Purchased the Habu two years ago and it's been my go-to piece for cooler weather ever since. It's versatile for temps in the 30s and 40s, and workable with another warm layer under 30F. Super form fitting piece, and definitely true to Assos sizing- order carefully. I am 5'11" 165lbs with even proportions wearing a medium, and it's very snug- uncomfortably so if I'm not in the riding position as otherwise it (by design) pulls across the chest. There's never any flapping in the wind- ever. The price is hefty for what's essentially a windproof front long sleeve jersey with a breathable back, but it's an amazingly designed long sleeved fall and mellow winter piece you can cram into your back jersey pocket.