Proquip cyclone half zip blue the proquip cyclone half zip is the perfect lightweight water repelling windshirt with a soft shell outer layer to give complete protection against wind and rain giving complete freedom with specially engineered four way stretch fabric made with bamboo fibres to give its soft polyester shell to improve breathability cut down on odour build up and fight against bacterial four way stretch for freedom of movement windproof and water repellent soft shell bamboo