The Toe and heel feature extra reinforcement against abrasion, and the reflective opening zippers are placed slightly asymmetrically towards the outside to increase comfort and water protection. Stratagon light membrane Fabric Stratagonlight is an ultrathin 3 layer laminated fabric construction; Assos stratagonLight features the latest in membrane technology, so called "flexible barrier function": when the temperature is low the membrane reduces permeability, meaning the membrane "closes", which helps retain body heat. Read more… As temperature inside your microClima increases, the membrane opens to enhance the evaporation process, ensuring stabilization of your body temperature. Assos stratagonlight allows for proper body temperature management. The advantages and uniqueness of the new Asses Stratagon generation of laminated fabrics is that they get the job done FASTER and feature lower volume to weight ratio than any other membrane textiles currently used in cycling apparel. StrataGon is an ASSOS exclusive engineered and made in Switzerland.