Doughboy liners are, hands down, the best above-ground pool liners on market, with true 20 mil and 25 mil thickness. Many other liners are only 20 gauge (not mil) or only 20 mil at the seam. When you feel a Doughboy liner, you will immediately notice how much thicker and more pliable it is than other above-ground liners. This marked difference is due to the much higher percentage of virgin vinyl and plasticizer used in Doughboy liners. These features create a liner that resists UV and chemical degradation. . Doughboy liners actually weigh 50-100% more than other liners, a telltale sign of their strength and durability.
Non-Doughboy liners typically carry warranties that prorate after the very first year. The only part of a liner that a manufacturer generally ends up covering under warranty is the seam. Other issues tend to be viewed not as manufacturer defects, but as normal, or user-inflicted, wear and tear (e.g., fading, holes, etc.). Unlike competitors' 1-year full warranty, Doughboy pools come with a 3-year full warranty, before proration, on the liner itself (5 years if bought with pool). Doughboy is so confident in their Therma-Seal Technology seam sealing process that they also offer a 100% lifetime warranty, with no proration, on the liner seam.
Doughboy's exclusive balloon-like expandable liners allow you the option of up to a 7 foot deep seamless "deep swimming area" (no jumping/diving).
Doughboy liners typically last 15-20 years, while other liners typically last 5-10 years. Keeping in mind that the labor, water, and chemicals are the biggest costs of liner replacement, choosing a liner that lasts 2-3 times longer than alternatives is clearly a wise investment!