Features: Vest style provides good coverage for maximum shade with side-release buckles for easy on/off. Three-layer construction absorbs water and promotes evaporative cooling. Leash portal on back for layering over a harness during on-leash pursuits. Mesh lining keeps dog dry and comfortable Leash portal on back is compatible with most harnesses Sizing: XS:17-22 in S:22-27 in M:27-32 in L:32-36 in XL:36-42 in