Arc'teryx  Delta Half-Zip Fleece Pullover - Men's

Bought this from another reviewer’s recommendation for trail running. The problem with this is, that it looks so sharp and feels perfect for every day usage, so I actually use it at the office and almost every day at home as well (daybreak color has almost same colored pocket, which helps). I run really warm always, so this not being so warm actually works perfect for me. If you run cold, I would maybe reconsider buying this (unless to buy it for spring/autumn as a layering, or for high output exercise).

The Delta 1/2 was one of my favourite fleece layers for many years, unfortunately my old one finally succumbed to years of abuse so I replaced it with the new incarnation. The similarities pretty much end with the name. The new fit is baggier than the last and the material used is far inferior to the polartec fabric of the previous. The pocket on the front makes no sense for rock climbing, the shoulder pocket was much more useful. I've searched high and low online for the old style but it seems it can't be found. Here's to hoping the previous formulation returns in future seasons.

As warm as a newspaper. Very thin fabric, so delicate it looks you can make a hole in it with your finger. The older Delta was nice and warm but this is rather a cooling jacket not something to keep you warm. But I get a feeling I would be warmer wearing nothing. The photos of the item are misleading, they create an impression the jacket is something in between RHO LT and Heavy. But its 50% lighter and thinner than RHO LT and should be priced accordingly.

Used it for trail running and as a base layer for skiing. Obviously the zipper gets cold on the skin, but the quarter zip helps dump heat in variable output activities. The material has held up, and shows no sign of beginning to stink despite >50 days using it. Tend to run hot, so I've used it as a base layer for -10 to 0 degrees on runs, and put another layer underneath/on top depending on conditions if it gets colder.

I’ve two of the older Delta zip necks and was so looking forward to their reintroduction. I wanted to really like the new version but the fit is horrible. It is well made and I think the Octo fleece is nice, but the fit is way off. On the XL I purchased (47” chest), there is way too much fabric under the arms and across the upper back, that and the sleeves are sized like pant legs: too much girth and much too long. I usually wear a large or X-large and this fit like a roomy XXL if not larger. The large I tried had terribly short sleeves and was tight across the back and under the arms. To that end, the garment was returned. The only thing accurate I found is Arc’teryx fit statement that the new Delta is roomier than previous versions. That’s spot on. Perhaps I’ll try again with the spring 2026 release to see if there is improvement. The price is a bit off-putting, too.

No experience with the older Deltas but I’m loving my 2024 Delta 1/2 zip as a standalone on runs below 50F. Definitely better for higher output activity like running, so depending on conditions I wouldn’t expect it to keep me toasty for lower output activities or sitting around. Currently dabbling with more synthetics after a lifetime of wool - with that said no complaints about the new fabric or overall comfort.

very nice sweatshirt, I use it for walking around the city and for trips to the mountains as a second layer, although I thought it would be thicker and a bit warmer. The pocket on the chest is a bit for decoration, it is a bit too high, and the iPhone fits into it on the butt and it is uncomfortable with it inside. Overall, I like the sweatshirt - I recommend it.

I’m wearing this now. I’ve worn it basically every day since I got it. It’s great. I like it because it is so versatile. It can be used for workouts, or unpretentiously with jeans and a t shirt, or ostensibly for rock climbing because you’re wearing Arc’teryx. It blends in in outdoor or urban settings. It looks good. It’s comfortable. What else is there to say.

I’ll wear this fleece pull-on for a number of activities. First, for every day activities, and outdoor sports, skiing, fishing, hunting, hiking and running. Since this garment was advertised as a fleece I thought it would fuzzy. That’s the only reason I rated it 4 stars, but I’m happy anyway. I’ll purchase your items in the future.

This fleece is the perfect lightweight garment for backpacking. I use it with a Patagonia or Smartwool base layer under a wind jacket or shell. It keeps me from sweating and can be worn as an outer layer if it is not windy. This fleece is good into the low forties under a shell. It looks so good you can wear it around town.