Got them from the "King of the Mountain" who was still living near the little big mountain. I've owned a bunch of Flexon's and the tongues in these are 2X as stiff others marked "COMP". It has a screw on attachment that suggests easy tongue changes. It has a more rounded shape at the shin. The bottom half of the shells are a matte finish. I don't trust/plan to ski them. My 9'1's are working fine. Thanks.