Arc'teryx has updated its hugely popular Beta LTE (lightweight) jacket for 2024, addressing our main concern with the previous model: sustainability. The new version uses the next-gen Gore-Tex ePE membrane. The new membrane is thinner and lighter than ePTFE, and that have have been identified as potentially hazardous the environment.

In all other respects, the new Beta LTE is very similar to (and which earned a full five stars from our reviewer Julia Clarke). It has the same slim fit that makes it comfortable to wear under a backpack and eliminates bulk, and is smooth enough to slip easily over a base or mid-layer It's long in both the sleeves and body, providing good coverage even for taller wearers, and the hemline dips at the back for added coverage. Unlike Julia I didn't find it long enough to sit on, but it's still a nice touch that prevents your backside getting wet when water runs off your backpack's rain cover.

Toggles on the bottom hem allow you to tighten it to fit. The sleeves can be tightened at the wrist using slim Velcro straps to keep out drafts and provide a snug fit around your . There are two hand pockets fitted with waterproof , and one internal chest pocket that's just the right size for a phone, credit cards, and keys.

Under the arms you'll find extra long pit vents with double-pull zippers, so you can adjust the ventilation to your exact preference. The Beta LT also has a built-in to help rescuers find you if you're unlucky enough to be trapped in an ava.