Is it normal to have a bubble on the bottom of my board?

What about clusters of little bubbles?

Yes to both. The larger bubble (about 3" in diameter) occurs directly under the board's valve. This is because we cannot have drop stitching in that area. The bubble will not spread or inhibit the performance of the board. It is simply cosmetic.

Your board may also have groups of tiny bubbles. This is completely normal. The layers of PVC are glued together and will commonly have small areas where dust or other small particles have settled during the manufacturing process. They too will not grow or inhibit the performance of your SUP.

Inflatable Board FAQs

How durable is an iSUP?
Can rocks damage an inflatable SUP?
Are inflatable SUPs good for yoga?
Is it single chamber or are there multiple air sections?
Does it come with a paddle?
Is there a d-ring on the back for a leash?
Does it come with a leash?
Is there an option to buy a shorter center fin?
Can you attach a bungee to the board to store items during transport?
Can you attach a GoPro mount?
Can you add a seat to the board?
How do I inflate my SUP?
How long does the iSUP take to inflate?
What are the recommended and max PSI for the board?
What kind of pump options are there?
What kind of valve is on the board?
Can I use an electric pump with this board?
How do I install the pump gauge?
My gauge won't register, is it broken?
How do I secure the pump nozzle? Do I have the wrong one?
How long can I keep my board inflated?
What is the best way to deflate and roll up the board?
What PSI do I inflate my board to?
How do I install the center fin?
Does the board come with a warranty?