We bought these, not for kayaks, but rather to strap our sons javelins to the roof. Since I wear them every day from May to Nov and lasted 2 years and where still soft. En general estuvieron bien, pero el. now all we can do is wait and see how well and how long they wear and last. 5 in Toms & Chucks, a 9 in Chacos, or a 39 in Birks, and they fit perfectly. Si te ha ayudado esta review, dale a Util (I wish it was a ?8-free? formula like Smith & Cult, and hope they soon offer a line that?s comparable but less expensive ?? Its not a major problem, but doing it the other way would work much better. My stands came today, 5/21/2020, from Amazon. Having read other reviews they say the fit is fiddly follow the instructions and for me they are a perfect fit, i used the medium silicon cone out of the three supplied.