## 3 Results and Discussion
During the study, the following question emerged: would there be a change in thermal stability in comparison to the original material? The sample was exposed to 65 \({}^{\circ}\)C for 24 h in a drying oven or 2 h of UV irradiation equivalent to the level of \"mountain sun\". TGA and DSC were performed. The weight decay occurred at about 240 \({}^{\circ}\)C and was associated with a mild exoeffect, which peaked and was terminated by an intense exoeffect with a maximum at 560 \({}^{\circ}\)C. It is important to test protective materials to meet safety requirements in companies [40]. Civil protection focuses on the prevention of crisis phenomena, the preparedness for crisis phenomena, the response to crisis phenomena and the return to the original state after the crisis [41]. Every organization tries to prevent the occurrence of a negative event through prevention [42; 43]. Despite this, it is not possible to completely eliminate the risk of a crisis phenomenon, which is why it is necessary to pay sufficient attention to preparedness for possible crisis phenomena [44; 45]. This will enable a more effective response and a smoother return to the pre-crisis state [46; 47]. In the case of an event where a dangerous substance is leaked, it is necessary for the responding firefighters or civil protection units to have clothing that provides the necessary protection. After an intervention involving a hazardous substance, protective clothing must be decontamination, cleaned, dried and then stored [46]. A previously used suit may have lower durability and protection even though the expected lifespan has not passed [48; 49]. Some authors have investigated the properties of protective clothing used by firefighters based on available data and evaluations [50]. In the case of firefighters' protective clothing, the focus of testing is mainly related to the effect of heat on the protective clothing [51]. The studies focus on the resistance of the material in the case of prolonged exposure to a certain factor and on the duration of damage to the material. Protective clothing may come into contact with various physical and chemical factors during use. Individual factors affect the properties of the garment and will damage it to a certain extent when they act on it. Within this study, we wanted to indicate the need to focus on this issue by taking these influences into account. Based on the results, it is possible to assess the extent to which the protective suit may be degraded and subsequently become unsuitable for further use. In the case of underestimating these factors, the health or life of the person involved could be endangered during an intervention with the used protective suit [52]. The importance of examining external influences on the quality of protective clothing is also emphasized in the research of [PERSON] et al. (2023) [53]. As part of our studies, we focused on certain types of influences with which it was assumed that the interventionist might come into contact. In the event that, in some areas, the responding units come into contact with other substances, a similar study should be carried out that performs these same procedures but with substances that are typical or expected for the given environment.