The fit of the Jet Stream really helps its effectiveness on slimmer dogs like Robin – the Swamp Cooler doesn’t actually touch his belly, because it’s so big (and due to its stiffness, he would have been chafed if it did).
The round cut and darted shape at the rump is really designed for lanky hound bodies with low-set tails. It appears from some of their product photos that they mean for the coats to fit longer in the back, extending down over the tail a bit.
The vest has three layers: a gray mesh lining, an absorbent core, and a tough, fine mesh shell. It’s cut for full coverage, and and fastens simply with one plastic quick release buckle on either side. As always, Ruffwear uses nice-quality buckles with smooth action, but they’re set deeply between two flaps of the vest to prevent accidental skin pinching, and it can be hard to get them fastened on an unhappily damp dog. There’s one small strip of reflective piping on the chest, which is sufficient since it’s rarely hot enough at night for a cooling vest.