Waterproof layer spread under a sleeping bag in a tent?
Sleeping bags are made of synthetic or cotton or wool or down (bird's under layer of feather) materials.
No.
Non there is no under layer
Penguins have special waterproof feathers tha t help them swim in the freezing waters of Antarctica. Their feathes are so warm and cozy that they might not feel the cold weather. Ever wonder how penguins can stand the smell of penguin guano?They can't smell it, that's why!
the layer under the mantle layer is the outer core
If it is under its shell its sleeping
this layer is above the mesosphere and under the exosphere
the layer of mud under the layer of decaying leaves
The subterranean layer is the layer under ground :)
My old discontinued one is.
The epidermis is the outermost layer of skin forming a waterproof, protective wrap over the body's surface. The dermis is the layer beneath the epidermis which is made of connective tissue that provides cushioning from stress and strain.
It is not "waterproof", but it does have a water resistant coating. This means that you can leave it under water from a good amount of time until it is actually effected.