Reflective Stitching
Black Neoprene Comfort Padding
Three Adjustable Sizes
Metal D-Ring (for Leashes) 
sizing
Size    Width    Length
Small    5/8" Nylon    Adjusts to Fit 10" to 14"
Medium    3/4" Nylon    
Adjusts to Fit 14" to 20"
Large    1" Nylon    
Adjusts to Fit 18" to 26"