There is a thin layer of water between your skin and the wetsuit. Your body heat warms up this thin layer of water in turn keeping you warm.
http://www.wetsuits.net/category/51440533061/1/Boys-Wetsuits.htm
They work in the same way that wetsuits do, just in reverse. The insulated wetsuit material keeps in the cold, without letting any warm outside air reaching the can, proloning the cold temperature of the drink.
The way wetsuits fit is very important. Typically if you are a Women you will want to wear a Womens wetsuit. The overall tightness of the Wetsuit can play a major roll on whether or not you stay warm in the water. See related links for an example of women's wetsuits.
what keeps penguens warm
Igloos so that it keeps them warm.
keeps it cool in summer and warm in winter
Because it keeps their heads warm!!
Because they want too and it keeps their head warm
a monkey keeps its self warm by its amount of fur
Woolen clothes keeps people warm in winters because the air gets trapped inside. People have been wearing woolen clothing for years in the winter months.
the male penguin keeps the baby warm be tween his legs
Thicker wetsuits are warmer, but stiffer to move in and heavier and bulkier to bring with you. If the water temperature isn't low enough so that you need the extra insulation it makes more sense to use a thinner, lighter and more comfortable material for your wetsuit.
they have several layers of feathers and they have feet covered in feathers to keep warm