Which skin type according to the Smart Tan Skin Type System indicates a high risk of sunburn?

Skin Type I in the Smart Tan Skin Type System is characterized by individuals who have very light skin, often freckled, and may have reddish or blonde hair. This skin type typically burns easily and does not tan well at all, making it highly susceptible to sunburn. Those with Skin Type I usually have a high risk of damage from UV exposure, as they lack the natural pigmentation that provides some protection against the sun's harmful rays.

In contrast, Skin Type II still burns easily but may tan slightly, and subsequent skin types (III and IV) are progressively less prone to sunburn and more capable of tanning. Therefore, Skin Type I is distinctly identified as having the highest risk of sunburn, warranting careful consideration of UV exposure and the use of protective measures like sunscreen while tanning.