The Kemp 20” and 24" ring buoy is approved by the USCG and is classified as a PFD type 4.
Kemp buoy features solid closed cell foam throughout. It is soft and resilient to the touch. It resists weather and temperature extremes and, most importantly, will not rot and mildew. Its USCG approval number is 160.050/147/0. Kemp recommends a throw line 10-220 with every ring buoy purchase.