Soft, comfortable, sturdy, well made.
It is small enough to tuck into a bra but easily can hang outside a bra. It holds credit cards and standard ID as well as cash. Because of its design, its shape is not easily visible through outer clothing (although in very light clothing its shape might be visible. Obviously people need to use common sense in using this. It removes the concern about losing keys, ID, cards and money from pockets or purses/bags while backpacking or traveling by train in foreign countries.