The active packaway ii overtrousers from regatta are designed to fit comfortably over existing trousers the overtrousers are waterproof and breathable benefiting from the isolite 5000 polyamide micro rip stop fabric isolite is a regatta technology that offers outstanding comfort and performance with permeable fabric that allows perspiration to escape keeping you dry and windproof performance to eliminate windchill including an elasticated and adjustable waist and taped seams the active packaway