I am 182cm, 67kg, chest 96cm, waist 78cm. I wear size S or M. I got a M size jacket, the lilac colour. It feels like XL. On descents the noise from the flappy shoulders It’s so loud! Jacket just for solo rides, no way having a conversation with It on. Not sure if a Small would solve the issue as well. The design is weird.

I needed a windbreaker that’s light , reasonable price and looks good. I thought this jacket meets my expectations. I use it mainly for commute in the early cool Perth winter to ride to work Recommended. - yes

I’m 6’ 6”, 235 with very long arms. The XXL is a perfect fit for me. The design and construction are exactly what I was searching for: a simple, super lightweight jacket for cool windy days.

I really wanted to live this jacket, well built, packs light but the biggest fault is that it flutters on the shoulder neck area at medium fast speeds. Maybe a Medium would be better? I got a large, according to the reviews and size chart. I can’t return it, so it goes to waste.

Light and packs up very small in your pocket . Perfect for cooler rides

Like Colt said, the jacket is too large in the chest and shoulders for the size, causing noise and fluttering. And this is coming from an athletic build with a weight-trained upper body. I would size down, but then would struggle with length and arm hole size. It's a great concept, just too casual above the sternum for performance riding.

Size up if you have broad shoulders

I like how packable and light this layer is. It's great for the days when a heavier jacket will be too warm and you need something to cut the wind over a jersey. The mesh backing does a great job of preventing the layer from becoming too clammy. I rode this on a misty morning in Santa Cruz, and it worked great. I have a 44" chest and athletic shoulders. The XL fits well with room for a vest or thin insulating layer if needed. Although the XL was sized appropriately, it fluttered in the arms/shoulder area while in my riding position. I don't want a cinched fit for an outer layer, but I need to size down to eliminate the flutter. The fabric material and pattern on the shoulder/arm construction would correct this in next year's model. Oh, a yellow or orange color would be great.

Loved the color and the quality. The fit was two sizes too small.

This is a very solid windbreaker, and the color is fantastic. It's packable and does its job. The only (very minor) gripe I have is that it runs pretty big. I'm in XL in all my Specialized kit, but this runs very large and kind of hangs off me. Could be the design, but something to note.

I had high hopes for this jacket as the design looked good, and Specialized size XS shorts fit me well. This jacket is nicely designed and made, but it is too large for me all around --- body, sleeves, cuffs, and neck, so I returned it disappointed that it didn't work out.