It might seem arbitrary to say 'more than you will need', but this is a well calculated guess. The float contains about 200 liters of air, so it will produce an upward force of about 200kg when fully submerged. Subtract the weight of the float itself, and you still have 185kg left to lift. Even if you are a big person who enjoys floating along, you won’t have a problem. Due to the upward force equal to the water displacement of your submerged body, only half of your body weight needs to be supported by the float. So counting on 10kg of camera gear, you’d have to weigh over 360kg to have a weight problem with the hide.   The Floating Hide Classic is shipped with a bag to carry the Hide in. This is not much bigger than a sports bag. The bag is larger than you need for the Floating Hide itself and leaves room for extra clothing, a pump, and other stuff. If size matters you can use the pump to extract all the air from the hull and you will end up with a very small package that fits in a suitcase or backpack. The complete kit weighs less than 6.5 kg The floating Hide II is even compact and weighs less - just 5.3 packed in a small bagasy to carry and take it with you on the plane. That unique opportunities for your photographic ambitions!