The Active Packaway II Overtrousers from Regatta are designed to fit comfortably over existing trousers The overtrousers are waterproof & breathable benefiting from the Isolite 5000 polyamide micro rip-stop fabric Isolite is a Regatta technology that offers outstanding comfort & performance with permeable fabric that allows perspiration to escape keeping you dry & windproof performance to eliminate windchill Including an elasticated & adjustable waist & taped seams the Active Packaway trousers keep you dryer & warmer With full length side zips for ease when slipping on & off the Active Packaway Overtrousers are essential to carry around for when the weather turns bad