21 Ft Round Pool Cover for Above Ground Pools - Heavy Duty 14x14 Scrim Triple-Layer Waterproof 2-in-1 Winter Cover + Solar Heat Boost, Winch and Cable Included, UV & Tear Resistant, Fits 21 Foot Round — Open-Box, 26% Off

PERFECT FIT FOR 21 FT ROUND ABOVE-GROUND POOLS — Sized precisely for 21 foot round above-ground pools. Reinforced edges, rustproof grommets, and a snug-pull winch and cable grip your pool wall through high winds, snow, and freezing rain.

14×14 RIPSTOP SCRIM, TESTED −40°F TO 160°F — Heavy duty 200 g/m² polyethylene shell with 14×14 industrial ripstop weave delivers 100% waterproof protection from snow, ice, leaves, and debris. Three bonded layers resist tears and UV.

SMART 2-IN-1 WINTER COVER + SOLAR HEAT BOOST — Patented SmartSide Technology: flip the black side up in summer for +10°F of free solar heat, then flip the blue side up in winter to reflect UV. Replaces a winter cover AND a solar blanket.

WINCH AND CABLE TIGHTENING SYSTEM — Industrial aluminum winch and plastic-coated 3 mm steel cable tension the cover tight against your pool wall. Easy one-person install in 15 minutes, no tools required. Stays tight through 60+ mph gusts.

COLD & UV RESISTANT, BUILT TO LAST — Performance-tested from −40°F to 160°F. Rustproof grommets, reinforced corners, and tear-resistant 14×14 scrim fabric stand up to ice storms, blizzards, and intense summer UV. Multi-season Planenfux durability.

Protect your 21 ft round above-ground pool through every season with the only cover engineered for both winter storage AND summer use. The Planenfux Triple-Layer 21 Ft Round Pool Cover combines premium 200 g/m² polyethylene fabric, an industrial-grade 14×14 ripstop scrim layer, and reinforced double-stitched binding to deliver heavy duty, 100% waterproof protection. Performance-tested from −40°F to 160°F — built for the harshest winter your region throws at it and the hottest summer sun. The patented SmartSide Technology turns one cover into two products. In summer, flip the black side up — it absorbs solar heat and warms your pool water by up to +10°F, extending your swim season without a separate solar blanket. In winter, flip the blue UV-reflective side up — it bounces sunlight away, slows algae growth, and keeps the cover cool and intact. The Winch and Cable Tightening System uses a plastic-coated 3 mm steel cable threaded through rustproof grommets and tensioned by an industrial aluminum winch. Unlike cord-and-clip closures that loosen in wind, this system pulls the cover snug against your pool wall and stays that way through ice storms, blizzards, and 60+ mph gusts. Installation takes under 15 minutes by one person — no tools, no specialty hardware, no contractor calls. Reinforced corners and 14×14 scrim-reinforced fabric mean this cover is built to last multiple seasons. Fits all standard 21 ft round above-ground pools. Order today and protect your investment with a Planenfux cover designed to outlast the winter.