![Size help! Getting an Atom AR and wanted to ask if I should go with the S or XS. I own both sizes - Atom LT in S and Proton LT in Size help! Getting an Atom AR and wanted to ask if I should go with the S or XS. I own both sizes - Atom LT in S and Proton LT in](https://i.redd.it/r7b0jp6wl7c61.jpg)
Size help! Getting an Atom AR and wanted to ask if I should go with the S or XS. I own both sizes - Atom LT in S and Proton LT in
![From top left to bottom right: Atom LT Paradox, Proton LT Labyrinth, Proton FL Dynasty, Atom SL Sense, Gamma MX Black : r/arcteryx From top left to bottom right: Atom LT Paradox, Proton LT Labyrinth, Proton FL Dynasty, Atom SL Sense, Gamma MX Black : r/arcteryx](https://i.redd.it/6nmo11sw4og61.jpg)
From top left to bottom right: Atom LT Paradox, Proton LT Labyrinth, Proton FL Dynasty, Atom SL Sense, Gamma MX Black : r/arcteryx
![Love how versatile the Beta AR is! Layered Delta LT and Atom LT underneath. Not too cold while static, comfortable while active! Temperature's between 17°F - 26°F / -8°C - -3°C. : r/arcteryx Love how versatile the Beta AR is! Layered Delta LT and Atom LT underneath. Not too cold while static, comfortable while active! Temperature's between 17°F - 26°F / -8°C - -3°C. : r/arcteryx](https://i.redd.it/8pekjz52aed61.jpg)
Love how versatile the Beta AR is! Layered Delta LT and Atom LT underneath. Not too cold while static, comfortable while active! Temperature's between 17°F - 26°F / -8°C - -3°C. : r/arcteryx
![From top left to bottom right: Atom LT Paradox, Proton LT Labyrinth, Proton FL Dynasty, Atom SL Sense, Gamma MX Black : r/arcteryx From top left to bottom right: Atom LT Paradox, Proton LT Labyrinth, Proton FL Dynasty, Atom SL Sense, Gamma MX Black : r/arcteryx](https://i.redd.it/gdht1zrw4og61.jpg)