If you don't like Full Seat breeches because they don't 'Stretch' then these are for you. They are made from high performance, lightweight but durable material which is designed to be quick drying as well as extremely comfortable but the real bonus is the stretchable Clarino seat which provides grip without sacrificing freedom of movement. A further detail is the well designed lycra ankle which gives a neat fit with no bulk. Truly technical breeches!