Transmitters can generate a lot of heat, especially when on a high power, which can become uncomfortable for actors. URSA Heat Shields are designed as a quick on-set solution to keep your cast comfortable and the cameras rolling. Made from a Premium Heat Resistant Foam which reduces the radiation of heat from a transmitter to the body by up to 40%. Heat Shields are durable, stretchy and soft to the touch & their closed-cell structure ensures excellent insulation with a low-profile depth of just 4mm. What’s in the Pack? 2 Small Shields (55 x 36mm) 2 Large Shields (68 x 50mm) Both sizes are 4mm thick and made to fit perfectly inside URSA Pouches and Straps. URSA Heat Shields are a simple, effective solution for keeping transmitters comfortable during long wear.