Which dermal layer is responsible for the dermal properties of skin that are evident as cleavage lines?

The dermal layer which is responsible for the dermal properties of skin that are evident as cleavage lines is reticular layer that is one of the regions of the dermis which placed deep to papillary layer. Reticular layer is the thick bottom layer of the dermis and its main function  is to protect the body from strain and prevent the stress that many external factors may cause.