Arc'teryx 's name refers to the Archaeopteryx - the world's oldest known bird and the brand's fossilised mascot. - Cut from GORE-TEX® with built-in dynamic stretch, these 'Cassiar' ski trousers are designed for maximum movement - The zipped vents in the articulated legs can be opened to reveal PowderGuardâ"¢ mesh that'll keep out snow - An internal webbing belt can be adjusted to achieve a great fit - Built-in RECCO® sensors pinpoint your location in the event of an avalanche Shown here with Aztech Mountain sweater, Arc'teryx jacket. - - Navy GORE-TEX® - Internal adjustable webbing waistband, two front zipped pockets, front zipped vents, internal elasticated cuffs - Snap and zip fastening - 85% nylon, 15% elastane - Machine wash - Designer colour: Nighthawk - Imported