Formlabs' reformulated Flexible 80A Resin: 4x higher rebound (56%), 2x tear strength (28 kN/m), and 2x elongation at break (230%) vs. V1.1 -- now on par with Smooth-On Task 16 cast urethane. Parts survive 12,800 Ross Flex cycles. Single-part, tack-free matte black finish. Form 4 and Form 4L.