A 600denier waterproof ripstop outer, fully fleece lined. Adjustable touch tape belly strap and thin elastic little leg straps . The Highland coat also features a zip to allow for a harness to be attached. 
For size gauging :
Nala (the GSD) is wearing XXL
Vincent (the Cockapoo) is wearing Medium
and Boo ( the Mini Dachsund) is wearing XSmall.
Lightweight
Waterproof
Matches the Rhinegold Torrent Rugs