Olang Stubai Tex OC Mens Snow Boots in Black The Olang Stubai Tex OC Mens Snow Boots in Black offer unparalleled comfort and practicality, the Olang Stubai Tex OC Mens Snow Boots in Black use a special Olantex membrane which makes impenetrable to both snow proof and waterproof, whatever the weather. The OC system on the Olang Stubai Tex OC Mens Snow Boots in Black features two sets of crampons that are embedded in the sole units. You can quickly and easily flip on the OC system when the conditions get icy and then return it to its original state when not required.