The Bump weighs 12.5 kilos (27.5 lbs) which is the weight of a healthy average sized mum-to-be who eats normally in pregnancy. But some mums can gain a little or a lot during pregnancy and give birth to a healthy baby. So much depends on what you weighed before your pregnancy, how active you are and what type of metabolism you have.

The Bump is designed to give the wearer a better understanding of the weight gain experienced during pregnancy. This weight is made up of baby, placenta, enlarged breasts, extra fat supplies needed for making breast milk, uterine muscle, extra blood, extra fluid and amniotic fluid.

Once The Bump is on, the wearer can "deliver" a healthy 4 kilo (8.8lb) baby by simply removing the two outer weight bags and then appreciate all the extra weight associated with pregnancy. Watch the expression on their faces when they appreciate this - so many people think pregnancy weight is just about the baby! Get a chair for that pregnant lady over there!

The Bump jacket weighs approximately 0.5 kilos, is made of polyester and has gel filled breasts and tummy that provide an extremely realistic sensation and look. The breasts weigh 0.5 kilos each (1.1lb) and the tummy is 3 kilos (6.6lbs). They do not require messy filling and emptying with water as they are permanently sealed and are made of a durable, yet soft plastic.

Additional weight bags are provided to allow a variable body weight. The weight bags are made of steel shot in bean bags covered in the same material as the jacket and they can easily be removed. There are four weight bags, each weighing 2 kilos (4.4lbs).

The Bump fits into a customised wheeled case for easy transport and storage.

Weight of the parts of The Bump

• 0.5 kilos (1.1lb) Jacket
• 1.0 kilo (2.2ld) 2 Breasts
• 3.0 kilos (6.6lbs) Bump belly
• 8.0 kilos (17.6lbs) Weight bags x 4