As the world’s first resin pool, the Sentinel has an ergonomic profile that also made it the first truly round above ground pool, with precision-molded connections that fit together perfectly every time. This is a pool with long-term benefits you’re sure to appreciate, and technical and aesthetic qualities that will keep you swimming year after year. The unique design of the Sentinel’s quality coupled with practicality and absolutely no angular joints produces ultra-strong uprights and top rails, solid joints and continuous-curve top seats striking the perfect balance between function, strength, and aesthetics.