You absolutely NEED these straps for tying down your bags!
I find these to be completely indispensable. I usually have a backpack or dry sack on the back of my bike, so keeping those things tied down securely is very important. These are the defacto, #1 best tie straps you can buy, and they’re cheap at only about $13 for a pair! They’re stretchy so they can accommodate a wide variety of shapes and sizes to tie down. I always have 2 pairs with me whenever I’m road trippin’.