Protector Pocket in fin area adds years of life to your board socknProtector Pocket creates place to store your surfing wax and suppliesnLight weight shock-absorbent terry loop material for extra protectionnPadded foam nose to prevent damagenUse with surf boards that are 6u0026#39;7u0026#34;- 7u0026#39;0u0026#34; for optimum fitnThe Culprit surf board sock features a Protective Pocket in the sock's fin. The protective pocket serves two purposes that help you get more mileage out of your board sock. First, the pocket creates a secure storage space with Velcro seal. More importantly, the durable pocket material prevents rips and holes caused by sharp fins, this fin area is where most board socks fail.