Dorema ONYX 270 Seasonal Pitch Awning. The Onyx 270 is part of the seasonal awning collection from Dorema, it is suitable for long periods of extended use between March and September. The curved profile of the Onyx adds to the sleek and contemporary design and the extra deep 270cm projection gives a little more room inside. The Onyx also boasts a 50cm deep canopy and Dorema’s unique detachable mud wall system. For anyone looking to pitch an awning seasonally.