spite my initial enthusiasm for the concept of air tubes, I find myself facing a recurring issue that has left me quite disheartened. Within just a year, my second Defender Air Tube has once again broken, casting a shadow over what could have been a truly revolutionary product. While I greatly admire the innovation behind these air tubes, the continuous need to purchase replacements has raised significant concerns about their long-term sustainability. To put things into perspective, I am now onto my fourth pair of Defender Air Tubes, and the latest one unexpectedly failed during my holiday, under what I would consider standard usage conditions. While this issue should technically still be covered by the warranty, the relentless cycle of purchasing new pairs has become both financially burdensome and emotionally frustrating. I had initially held high hopes for the Defender Air Tube, but these persistent durability issues have taken their toll on my confidence in the product. With some improvements in this aspect, the concept could truly flourish and provide the exceptional experience it promises.