What is the basis for dividing the 'Field Level' numbers written in the product descriptions?

The Field Level assigned by SIERRA DESIGNS is a guideline that expresses the depth of the setting where one will wear the clothes in everyday language. It helps you assess whether it is the clothing you need without having to examine complicated fabrics or specifications one by one.

The numbers are divided from 1 to 3. The lowest, Level 1, is for products intended for explorers who are just starting outdoor activities or people seeking new relationships and experiences outdoors ^[1]. It is good to wear for light, pressure-free schedules such as walks near the city center or casual outings.

The intermediate Level 2 targets people who cross seamlessly between everyday urban spaces and actual outdoor natural settings ^[2]. It is convenient to choose for schedules that lead from commuting to weekend outdoor activities.

At the highest, Level 3, the environment becomes considerably harsher. These are clothes for experienced adventurers who enjoy dynamic nature in any severe weather or environment ^[3]. They serve as a necessary protective barrier for people who plan to face an unpredictable wild, such as rain and wind.

hmmm, it is a classification method that asks first about the place where the wearer will stand and the depth of their experience, rather than putting equipment specs forward.