Kamleika utilises stretch to make waterproofs for active use this unbelievable stretch is possible due to the jackets unconventional knitted face the stretch allows for the jacket to be cut closer around constant moving joints this removes swooshing sound and rub caused by fabrics moving separately from the body by fitting tightly the jacket also has improved breathability for best results we recommend tightening cuffs and waist to trap air and build an internal pressure gradient