- Two spare filters for use in the City and Nitesight masks
- Contains a Dynamic Activated Charcoal Cloth filter
- The filter is designed to remain effective for at least 1 month of normal daily use in the urban environment
- Product is non-returnable for hygiene reasons
- We do not accept returns if the item is used (seal broken and face fitted). A mask is considered a ‘personal’ item, we are unable to resell it as this poses a cross contamination threat. Any items that are returned without authorisation will be destroyed owing to the potential viral threat.