Maternity bundle Includes: •Pregnancy sea belt adjuster •Maternity Belt Back Support I used the pregnancy seat belt adjuster during my 2nd and 3rd trimester, and it made car rides so much more comfortable. It keeps the seat belt from pressing on your belly, which is a huge relief. It's in great condition and super easy to install. Definitely a handy thing to have for any expecting mom. The belt back support helps ease back, hip, and pelvic strain; offers light, everyday support while promoting comfort through pregnancy and postpartum recovery.