Arc’teryx Theta AR (2015)


Using the tough 3-layer Gore-Tex Pro fabric for durable levels of waterproofness and breathability, the Arc’teryx Theta AR is a workhorse design. It has two huge chest pockets, plus pit zips. The hood is helmet-compatible with a stiffened peak. All that for 450g (size men’s L) looks great for use on the hill. 5/5


Men’s sizes are XS-XXL and women’s are XS-XL, with a fit that is longer than most jackets and the longest in the Arc’teryx range. On me it came to just below my bum and offered welcome protection that others didn’t meet. Sleeve movement is very good with no cuff or hem movement. The helmet-compatible hood fitted closely and moved well with my head. 5/5


The Arc’teryx Theta is a stiffer jacket than some but that for me is a benefit as it does not distort as easily as others in the wind, which means it can retain warm trapped air inside. Breathability and waterproofness are great in part as the pockets are sealed rather than mesh and you have pit zips if required. Nothing wrong here and great comfort in challenging weather. 5/5

In use

The weight and features are generally great on the hill and I particularly liked the extra length. But there are only two pockets, however they are big and easily accessed while wearing a pack. The hood’s peak does perhaps not provide the same level of protection as the absolute best, which boast a larger wired design. A third pocket is my main request! 4/5


You can get jackets with more pockets and a wired peak with similar fabric performance for less, which makes the Arc’teryx Theta AR extremely pricy. 2/5


The Arc’teryx Theta AR is an excellent lightweight jacket that is very practical for tackling wild mountain weather, but the price is a little too wild for many I suspect. 4.2/5

Review by Graham Thompson

First published in Trail magazine November 2015