To fasten the strap, pull the strap through the middle of both metal buckles at the other side of the cover. Next, pull the strap over the top of the second metal buckle and back through the middle of the first metal buckle. You should feel the strap tightening as you continue to pull it.
To further tighten the strap, continue pulling the end of the strap. This will make the cover hang higher and decrease the opening through which you can see your baby.
To loosen the strap, hold the metal buckles and pull the other side of the strap (the side that is attached to the cover) away from the metal buckles. This will make the cover hang lower and increase the opening through which you can see your baby.
Please check out this video which illustrates the process.
