ostra large bio essential black goggle. by popular demand spektrum designed the ostra large for those seeking a maximized field of vision along with the sleek, modern style of their most popular model. they have increased the measurements of the ostra with a few well engineered millimeters and besides the benefits in visual range it also fits to bigger helmets and faces in a more streamlined way. the expanded design provides exceptional peripheral view in all directions and a seamless integration with most helmets. as the original ostra, it has pivoting outriggers, a magnetic, cylindrical lens, great fit and sharp looks.