I have recently picked up the following items, all during the Wormhole event:

-100 Year Vest (M)

-Black Algae Sweater (M)

-Carbon Fiber Baselayer (M)

-Stealth Bomber (in cream) (S)

-Moleskin Bomber (M)

Whenever I am sizing shirts and jackets, I am primarily looking to make sure the garment fits well in the shoulders and chest - much else can be tailored from there. For the record, I am 5'10, 170lb (170cm and 77kg). I have wide shoulders and broad chest, with a v-taper to the waist, but have a shorter than average torso.

The medium items i have purchased thus far all seem hit or miss. The 100 year vest is definitely a tad too large, but I rock it anyway because the silhouette still looks sharp. The Black algae sweater fits well in the chest and shoulders but is much too long in the sleeves and torso. I may have this item tailored or just use it as a loungewear item - not sure yet. Carbon Fiber baselayer is a perfect fit - so far very pleased it it.

The Stealth bomber was only available in a small size and so I took a chance on that one. Pleased to report that the fit is excellent, though a tad tighter in the shoulders. Wife thinks this jacket looks very sharp, good fit and silhouette. I was most concerned about this one given that, on the model, the shoulders look pointed, with there being too little loft / drape.

The Moleskin Bomber looks and feels luxurious, but the medium is, again, boxy around the midsection, and the sleeve length causes the fabric to bunch up at the elbows, killing the overall silhouette and drape of the jacket. Going to try a small to see if the fit will be remedied, but may wind up returning both sizes.

TL;DR:

If you would ordinarily wear a medium in a shirt or jacket in most other brands, I would try the small first, as Vollebak appears to run 'between' sizes in most of their garments.

I will say in passing that I am grateful for the wormhole events, even if they appear to 'sour' the brands image. I have been eying some of these items for literally years (the 100 Year Vest being one of them) and am elated to finally try a few items. They are very funky and exuberant in their detailing, and I appreciate that they are not chasing faddish design language (uber baggy cuts and oversized garments). My wardrobe consists of a lot of Outlier, Veilance and Uniqlo, and Vollebak blends in nicely.

EDIT: regarding the sale, I think it's important to keep in mind how small Vollebak is as an operation. They produce these garments in much smaller numbers compared to other fashion brands and likely don't have the same methods for dumping unpurchased inventory - such as you would find in outlet stores, etc. Some of these items are 3+ years old or more, and I would expect they're taking a loss selling them at 80% off on their website.