2-layer bonding can be applied to any kinds of textiles, whether they are made of natural fiber, synthetic fiber, yarn dyed, or piece dyed.  Different materials can be bonded together, such as fleece, jersey, bird eye, tricot or sherpa of various thickness and weight.  In doing so, you combine windproof and water-repellent characteristics of the outer layer with the warmth-keeping function of the inner layer.  Due to its design and practicality, this series is ideal for all types of jackets, especially those which can be worn on either side.