6m Extreme 40 Black Extension AwningExtreme 40 Instant Shelter Rain Extension Awning. Our Rain Awning Extensions expand the actual size of our 3m x 6m Extreme 40 Instant Shelters, allowing market traders to keep customers and stock dry in wet conditions and provide shade on sunny days. Attaches to your existing rain awning canopy. Each canopy can have up to 4 rain extensions. The rain awning extension has Velcro banding allowing it to attach to the canopy via reciprocal Velcro banding.