Description   Environmental Impact Designed with biodegradable materials, minimizing its impact on the environment. Non-toxic coloured smoke 99.5% biodegradable Low CO2 output Clean composition Common FAQs Can I hold the Twin Vent II? Always use gloves and eye protection when holding the product. Can I use the Twin Vent II? No, the Twin Vent II should only be used outdoors with the land owner’s permission. Does the smoke stain clothes? The smoke will not stain unless it’s held closely (within approx 30cm) to any surface, including clothing. How do I ignite the Twin Vent II? Pull the ring firmly, at a 90 degree angle to the side of the Twin Vent II. Is the smoke from the Twin Vent II toxic? All our products are non-toxic and the unit itself is biodegradable after use.