From the great makers of the Chesapeake Baydog Harness.  Functional and stylish.  
 
Traditional Canine Life Jackets press on your dog's neck and cut into your dogs tender underside with think nylon belly straps. The Monterey Bay Life Jacket is DIFFERENT.  It supports your dog's entire body from below and lifts their head and body higher than the waterline.
 
FEATURES
FULL TORSO SUPPORT:  Ergonomically designed to allow complete range of swimming motion
RESCUE HANDLE: Durable handle with reinforced stitching
HI VISIBILITY: Bright colors that are easy to spot
REFLECTIVE TRIM: 360 degrees of nightime visibility 
UV RESISTANT COATING: Maximum security and fit
SALT WATER RESISTANT HARDWARE
 
Size Chart Below 
(and in pictures). If local we suggest bringing your dog in for a fitting! 
 
XS:   Neck 9-10 inches, Chest 12-16 inches
SM:  Neck 10-14 inches, chest 15-20 inches
MD:  Neck 15-18 inches, chest 21-28 inches
LG:   Neck 18-22 inches, chest 30-36 inches
XL:   Neck 21-27 inches, chest 37-46 inches