Oakley Timber Biozone Shell Overall Men's Ski Snowmobile Bibs, Jet Black BioZone Shell lining system provides targeted sweat management, heat retention and movement for cold-weather performance Durable, breathable FN Dry 15K technology blocks out the elements and is waterproof up to 15,000mm Inner thigh zip vents with mesh insets allow customized breathability Ankle gussets allow for easy changing over boots Pass rivet at belt loop and multiple pockets provide convenient function