The LensCoat gkjr. Katana junior gimbal head cover offers your valuable equipment some protection from scrapes and bumps, preserving its appearance and reusable value. They also help break Up the shape, making it less noticeable to wildlife. The gkjr. Katana junior gimbal head covers are made of closed-cell Neoprene and also act as a thermal barrier, helping to protect your hands in hot and cold temperatures.