Softshell” is a class of knit or woven materials, made from polyester
and nylon, used to make technical outdoor clothing that essentially
bridges the gap between waterproof hardshell jackets and highly
breathable fleece jackets. They are more breathable, flexible, and durable than
hardshell materials and more protective than fleece. Softshells
are designed with aerobic activities in mind. They perform the best when
the wearer’s heart rate is high and weather conditions are variable.
However, they are less water and wind resistant than hard-shells.