Britax Safe'n'Sound Instructions For Installation & Use page 33

C. Place baby into Baby Capsule lying on its back so that the
buckle is between the baby's legs. Ensure that baby's arms
and legs are free. Make sure baby is dressed to allow the
Harness Buckle to be pulled up between baby's legs e.g.
a jump suit.
NOTE:
1. Discontinue using the Padded Insert when shoulder straps
are in the top slots or if the Pad causes over heating,
discomfort or you need more room for baby to grow.
2. Correct fitment of the harness is very important as it
restrains the baby in the Baby Capsule. The harness must
fit firmly around upper torso of the baby and be positioned
to leave the baby's arms and legs free.
CAUTION:
Do not harness an infant wrapped in a blanket or swaddled as this increases the risk
of ejection and injury or death in a crash. The harness needs to fit firmly to the baby,
any blanket or other covering may be placed over the harness after the harness is
adjusted. Arms and legs must be free and not bound. The legs must sit on each side
of the crotch strap.
HOW TO USE
Instructions for Installation & Use
33