Silva is a Swedish outdoor products company best know for there high grade compass. They are the market leader, there best compass is the Silva Expedition 4 compass. It is an award winning compass that is used by various defence forces from around the world, it is light and durable also easy to use at night as it has luminous points and has silicon feet to stop it moving around the map, also waterproof, it has various roamer scales so it can be used with different maps, it has stencil holes so you can mark on the map and a large base plate to make navigation easier, it is a top of the range compass that will last a long time