This K&N cap is pre-fitted. It has a silver undervisor and is made from material consisting of 98% cotton and 2% spandex. Small/medium sized caps fit a 6 3/4 to 7 1/4 hat size and large/xl sized caps fit a 7 1/8 to 7 5/8 hat size.

K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and air intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies.