Is it considered normal to have pinholes in a fire shelter?

Having pinholes in a fire shelter is considered normal because they are part of the design and allow for some degree of ventilation. Fire shelters are constructed with specialized materials that are intended to reflect heat and provide a barrier from flames, but they also need to breathe to prevent buildup of carbon monoxide and other hazardous gases. Small pinholes may be included as a safety feature rather than as a flaw, as they facilitate airflow while still providing the necessary thermal protection.

In assessing the options, the rationale for the other choices revolves around the understanding of fire shelter design and safety protocols. It's essential for anyone interacting with fire shelters to recognize that a certain level of permeability may be acceptable, as it serves a purpose in ensuring occupants do not experience asphyxiation under extreme conditions.