It works with her (rather than against her, like so many do). When properly sized/adjusted, she can't escape it (as she has each & every other, including the multiple "escape proof" ones that we've tried). It moves with her & her active lifestyle. I appreciate the bit of extra protection of the lightweight padding, as she blazes trails! She is a size Small, she weighs 9.5 lbs.
She loves the rain, and I love how dry (& warm in winter) a portion of her stays. We've bought several colors over a short time, so that she always has a fresh/dry one. One has been washed multiple times & is as good as new.
Not restrictive, yet secure. For her, the placement of straps couldn't be better, plus there is plenty of room for adjustment in 3 spots. The buckles are easy and not overly large. Last but not least, the placement for leashes is super! It really helped her and me arrive at our walking style (it took a bit!) The multi-placement also makes it great for under winter coats & rain jackets, as they all seem to have the hole for leash in a different location! We LOVE wildone!