URSA Undies are made from ultra-light jersey fabric, designed to be as comfortable as wearing regular underwear. They are designed to be a tight fit in order to hold the transmitter in place but not a compression garment like URSA Shorties.
Around the waist is an infinity-loop pouch, which allows sideways rigging at any point around the loop. On the thighs, there is also a loop for sideways rigging, along with an inner leg popper pouch for vertical rigging.