Replacement liner for 6D Helmets ATS-1R helmets. Designed to restore the original fit and comfort, this direct-fit liner ensures optimal comfort and support and makes it simple to replace worn or damaged padding. Quick to install and engineered to maintain helmet performance, it helps keep your helmet feeling fresh, secure, and comfortable for extended use. Compatible with ATS-1R models, this liner is an easy, reliable way to renew comfort and support inside your helmet.