What are inflatables made of? ISLE Customer Support October 10, 2018 17:20 Updated Follow All of ISLE's inflatables are made of a military grade dual-layer PVC to create the best board on the market! You can also check out our SUP construction guide here. For more information Check out ISLE iSUP Guide video: iSUP Guide Video Related articles What is the weight limit on inflatables? Can I change my shipping address? How do I tighten by iSUP Valve? What is the warranty on hard boards? How long does it take to inflate? Comments 0 comments Please sign in to leave a comment.