The characteristics of the mantle are : 
1. It is the middle most layer of the inner part of the earth 

2. the depth of the mantle is 100 km to 2900 km 

3. The mantle is comparative hot when compared to the crust. Because we know that when we increase the depth the pressure increases and by this the temperature increases. 

4. We can find the sand and many chemicals here in this layer of mantle.