EVANS Level 360 technology resolves the age-old dilemma of traditional synthetic heads consistently not fitting the drum shell without using considerable force. For over 60 years EVANS has been an innovator in drumhead manufacturing and design. As the creator of the first synthetic drumhead and other revolutionary products such as EMAD Hydraulics and the UV1 series EVANS drumheads are designed with the intent of solving problems for drummers. Regarded for high quality and consistency all EVANS drumheads are made in the USA and feature Level 360 Technology 18 drum head made using Two plies of 7mil film Two plies offer consistency and durability for longer playing time. Very versatile head for all music genre applications a true working drummer s choice.