A jaw member, end effector assembly including the jaw member (272) and an ultrasonic blade (234), and an ultrasonic surgical instrument including the end effector assembly are provided. The jaw member includes a structural body and a jaw liner (290). The structural body includes a pair of proximal flanges and an elongated distal portion extending distally from the proximal flanges. The elongated distal portion includes spaced-apart side rails (280) defining an elongated opening therebetween and interconnected at distal ends thereof via a distal cap. The jaw liner is engaged within the elongated opening and includes a base and first and second arms (292) extending from the base. Each arm defines an inwardly-angled tissue contacting surface. The jaw liner defines a jaw liner compliance feature (295) extending longitudinally therealong between the inwardly-angled tissue-contacting surfaces of the first and second arms to facilitate outward deflection of the first and second arms relative to one another.
