Constructed from a lightweight energy absorbing polymer foam that is perforated for high levels of airflow and comfort, the NUCLEON KR-H Hip Protector is certified to Level 1 (EN 1621_1:2012). The Nucleon KR-H is anatomically profiled to allow freedom of movement while riding and can be worn under leather racing suits. Features Ergonomically profiled and engineered for freedom of movement. Designed to fit under leather racing suits. Constructed from high-energy absorbing viscoelastic PU memory foam compound that is lightweight and perforated for comfort. KR-H version certified to latest EN 1621_1: 2012 (level 1).