BATHING FOR HEALTH HAPINES BATH BOMB DUO. Benefits: Restful slumbers are a magnesium bathtime away with Lush's Deep Sleep Epsom salt cube.. After your workout, cool down in a rejuvenating, magnesium-rich bath with Lush's Salt Water Soother Epsom Salt Cube, made of 50% Epsom salt to care for sore muscles.. Features: These self-preserving products are formulated to stay fresh and effective without added synthetic preservatives.. Includes: Deep Sleep Epsom Salt Cube. Salt Water Soother Epsom Salt Cube.