Arc’teryx Beta AR vs Beta SL
Choose the Beta SL when lower carried weight is the priority. Consider the Beta AR if its heavier construction, regular fit and DropHood design suit you better. Both have pit zips and helmet-compatible hoods. The current manufacturer weights are 340 g for the SL and 460 g for the AR.
Based on 917 included owner reviews. Owner evidence spans multiple revisions; current specifications do not describe every reviewed jacket.
Weight, construction and fit are the main differences
At the current manufacturer weights, the Beta AR adds 120 g over the Beta SL. Arc’teryx uses a heavier hybrid face fabric on the AR, with reinforcement across the upper yoke. The SL is the choice to examine first when you want to reduce carried weight.
Hood design also differs. The AR has a helmet-compatible DropHood; the SL has a helmet-compatible StormHood. Both offer pit zips. If possible, try the hood and collar with your helmet and midlayer rather than choosing from the names alone.
Arc’teryx labels the current AR regular fit and the current SL fitted. Our owner reviews cover multiple revisions of both model families, so older fit or durability experiences should not be treated as tests of the exact current construction.
Technical comparison
Beta AR
GORE-TEX PRO ePE shell with a 100-denier upper yoke and an 80-denier body. A helmet-compatible DropHood, pit zips, two hand pockets, an internal chest pocket and a RECCO reflector. The manufacturer lists a weight of 460 g. The manufacturer describes a regular cut.
Beta SL
GORE-TEX ePE shell with a 40-by-70-denier face and a C-KNIT backer. A helmet-compatible StormHood, pit zips, two hand pockets, an internal chest pocket and a RECCO reflector. The manufacturer lists a weight of 340 g. The manufacturer describes a fitted cut.
What the owner evidence adds
Low weight is mentioned positively in 36.7% of Beta SL reviews and 11.9% of Beta AR reviews. That is consistent with weight being an important buying consideration, but the manufacturer’s gram figures are the appropriate basis for the technical comparison.
Durable construction is praised in 10.6% of AR reviews. Opposing minority findings include peeling or delamination (4.1%) and rain getting through (3.1%). A heavier shell should not be presented as immune to those problems.
For the SL, 7.8% of reviews mention noisy fabric and 5.6% find the body too small. The AR also has sleeve-length complaints (4.5%). Our Beta AR owner reviews and Beta SL owner reviews provide the full summaries.
Should you choose the Beta AR or Beta SL?
Choose the Beta SL if a lighter shell is the priority and the fitted cut works over your layers. It retains useful mountain features, including helmet compatibility and underarm ventilation.
Choose the Beta AR if the regular cut, DropHood and heavier face construction are useful to you. Consider the recurring durability concerns alongside the praise, and verify the exact model code when shopping older stock. The specifications here describe the current manufacturer versions.