When wearing a conventional roll splint, several important considerations should be kept in mind:

1. Skin Care: Wearing a splint can cause friction and pressure on the skin, so it is crucial to keep the skin clean and healthy. If rash or swelling occurs, consult a medical professional immediately.

2. Wearing Duration: Wearing a splint for too long can weaken muscles and cause pressure injuries, so it is essential to follow medical or rehabilitation experts' directions on how long to wear it.

3. Regular Adjustment: Splints may need adjustment depending on the user's condition, so regular adjustment and monitoring are necessary.

4. Discomfort: If there is discomfort or pain while wearing the splint, consult a doctor or rehabilitation expert immediately.

5. Skin Inspection: The skin should be inspected before and after wearing the splint to check for any skin damage caused by the splint.

Starfix uses air mesh and thermoplastic resin for the reasons outlined above:

1. Skin Care: Starfix's air mesh is specially developed to absorb and dry sweat from the affected area, helping to maintain skin health.

2. Wearing Duration: The design of the product takes into consideration that overly rigid fixation can prolong rehabilitation, hence its design flexibility.

3. Regular Adjustment: As the user's condition may necessitate adjustments, Starfix's thermoplastic resin allows for easy modification to fit the body part snugly.

4. Skin Reaction: Starfix uses non-toxic air mesh certified by KATRI (Korea Apparel Testing & Research Institute) and is registered as a Class 1 medical device with the Korean Ministry of Food and Drug Safety.

These features should be considered when choosing a splint to effectively assist with injury recovery or condition management. If the injury is severe or recovery is uncertain, consulting a medical professional immediately for diagnosis is crucial. The information provided here is based on general knowledge. However, as everyone's condition varies, it is safest to seek a medical professional's advice for any symptoms.