Top critical review
"One Size" does NOT mean Adult Size.
Reviewed in the United States on October 20, 2019
"One size" does NOT mean adult size. Measures 1.05" max thickness. Picture doesn't show the 24+ inch long "Underside finger grooves" channel carved out of the backside. Don't be fooled, the "Side finger scallops" and "Underside finger grooves" are not useful features. They save Speedo money by eliminating material while sacrificing buoyancy.
I've swam competitively for 16 yrs and never once held a kickboad where the "Side finger scallops" are located. I've always rested the entire length of my arm(s) on the board and gripped the front. I'm 185lbs and this kickboard can't generate enough buoyancy to lift your face/mouth out of the water while looking forward.
Also, this kickboard is made in Vietnam.
I returned for a full refund.