Soft shell, hard shell, and fleece are all materials widely used in clothing and outdoor products, and they have some differences in performance, structure, and purpose.
Soft shell material is a thin, soft, breathable material. It usually consists of two or three layers, the outer material, the middle breathable membrane layer (including GORE-TEX) and the inner breathable layer, which has the functions of waterproof, breathable, warm and windproof. The advantages of soft shell materials are soft, smooth, comfortable, appropriate breathability and thermal insulation, and high flexibility during outdoor activities. Due to its lightness and close-fitting characteristics, it is generally used in light rain or shower weather.
Hard shell fabric is a kind of fabric with strong waterproof and windproof functions. Specially treated fabrics and membranes are often used to prevent moisture from penetrating into the interior and to provide effective wind protection. Hard-shell materials are often used in outdoor sports such as mountaineering, skiing, and rock climbing that require high comprehensive waterproof performance, and can provide better resistance to wind and rain.

Fleece is mainly made of cloth, with a fluffy texture and just the right amount of warmth and breathability. Often used as a mid-layer insulation during outdoor sporting activities. It has good thermal insulation function, can quickly wick away sweat, breathable, and improve comfort. Fleece fabrics are generally not waterproof or windproof and are suitable for use in dry and cold conditions.
To sum up, soft shell fabric are suitable for outdoor activities in light and medium climate conditions and provide better breathability; tough shell materials are suitable for outdoor activities in waterproof, windproof and harsh climate conditions; and fleece fabrics are suitable for Provides good warmth and breathability for cold and dry environments.