Support
Frequently asked questions.
How does MO/GO attach to the Arc'teryx Gamma pants?+
Two lightweight prepreg carbon-fiber cradles slide into concealed internal tunnels inside the tailored Arc'teryx Gamma EX pant. The external motorized knee joint snaps onto low-profile magnetic-mechanical ports in under 15 seconds per leg.
What happens if the battery runs out mid-hike?+
MO/GO uses a backdrivable quasi-direct-drive planetary transmission. If the battery depletes or you switch the module off, the joint free-wheels with virtually zero mechanical resistance (< 0.08 Nm), or you can unclip the 390g actuators and stow them in your pack.
Does MO/GO protect my knees on steep downhill descents?+
Yes. Downhill Descent Shield mode uses computer-controlled eccentric damping to absorb up to 30 lbs of perceived impact per stride, protecting patellar tendons and meniscus cartilage on steep switchbacks while trickling up to 12% energy back into the battery.
Can I wash the pants and hike in heavy rain or snow?+
Yes. The motorized knee modules and Climber Battery Packs are sealed to IP65/IP67 standards against mud, sleet, and stream crossings down to -20°C. Once the external modules and internal carbon cradles are unclipped, the Gamma EX pants are 100% machine washable.
Can I fly with MO/GO batteries in my airline carry-on?+
Yes. Each Climber Battery Pack is rated at 98 Wh, complying with FAA, TSA, and international IATA limits (< 100 Wh) for passenger carry-on luggage.
How does the Batch 01 reservation, sizing, and warranty work?+
Submitting a reservation locks in priority Batch 01 allocation with a 100% refundable $99 deposit. Six weeks prior to shipment, a Skip Fit Specialist confirms your exact pant inseam and carbon cuff curvature. Every system includes a 2-year alpine hardware warranty.
Arc'teryx Gamma EX Fit
Size guide
Every reservation includes a 1-on-1 fit check prior to shipping.