Inflatable structures from enchanted castles to animal-themed bounce houses to water slides have surged in popularity in recent years, providing a fun-filled way to spice up parties, corporate events, and carnivals. However, as thrilling as they can be, maintaining safety within these inflated structures is of utmost concern for event organizers and parents.

When renting inflatables, look out for these five safety signs:

1. Check Labels for Compliance Standards 

All reputable inflatable rental companies ensure their inflatables comply with the safety standards set by the relevant bodies in their region. In the United States, for instance, the ASTM International (formerly American Society for Testing and Materials) provides comprehensive safety guidelines for inflatable structures. Check inflatables for ASTM certifications, indicating that the product meets stringent safety precautions in its design and operation.

2. Look for Structural Stability

Inflatable structures should exhibit signs of structural stability: are the seams reinforced appropriately? Is the inflatable equipped with more than one air-filled chamber for enhanced stability? Well-established inflatables should not exhibit excessive motion or instability when in use. An unstable inflatable might indicate a safety risk that could lead to accidents.

3. Secure Anchoring System

Per ASTM standards, all inflatables should be equipped with a secure anchoring system. The inflatables must be anchored to resist wind forces and prevent applied loads from tipping over. Rent inflatables that come with well-established anchoring points and sturdy tethers for secure fastening.

4. Safety Signage and Instructions

The inflatables must have visibly clear safety signs and instructions, indicating the rules of usage, the maximum capacity, age/height/weight restrictions, weather conditions for safe use, among other pointers. Well-marked safety signage and operating instructions demonstrate the rental company’s commitment to delivering a secure and memorable amusement experience.

5. Emergency Exit Points 

In emergency situations, it's paramount to have swift access points for exit. Verify whether the inflatables have quick exit points, preferably on each side of the structure. These points should be easily accessible and not covered or hidden. Look for clear signage indicating the emergency exits.

In conclusion, inflatables can transform any ordinary gathering into an exciting event, but safety must never be taken lightly. Before renting, always ensure that the inflatables comply with safety standards, exhibit structural stability, have a secure anchoring system, clear safety instructions and emergency exit points. Safety starts with awareness and the knowledge of what to look for, ensuring a safe and enjoyable experience for all.