Nelsons Arnica Cooling Gel (30g). Nelsons Arnicare arnica cooling gel is ideal to massage into your muscles to cool and revive after a work or a long day standing on your feet. The gel is refreshing with a non-sticky texture so it is ideal after exercise. Specially formulated with zesty grapefruit oil to refresh and revitalise, it is a kit bag essential amongst gym goers and professional sports people alike.. Benefits & features:. Paraben-free. No artificial colours or fragrances. Natural first aid. Active ingredient is arnica Montana. Gym bag essential