Yankee Pool Pillow Oval Pool Cover 21x41 ft — Sapphire Series, 185 gsm Heavyweight, UV-Resistant

Yankee Pool Pillow’s oval 21 × 41 ft cover is a heavy-duty winter cover designed to protect above-ground pools from UV, debris, and freezing temperatures while securing tightly with a steel-core cable and reinforced grommets.

When you need an above-ground pool cover that lasts through harsh seasons, this oval cover from the Sapphire series combines heavyweight fabric, UV-resistant coating, and a robust fastening system to keep water clean and reduce maintenance. Built to higher industry standards, it balances durability and ease of use so you can close your pool confidently and reopen it with less cleanup.

How does this cover resist sun, cold, and weather damage?

The cover uses a 14×14 scrim weave and a 185 gsm density for stronger seams and puncture resistance compared with lighter tarps. An LDPE coating deflects UV rays and the black underside helps limit algae-forming light penetration. Materials are chosen to remain flexible and intact across wide temperature swings.

• 14×14 scrim count for reinforced fabric strength
• 185 gsm density to resist tearing and abrasion
• LDPE UV-resistant coating to reduce sun degradation
• Rated to perform from −10°F (−25°C) up to 180°F (80°C)

What fastening system prevents the cover from collapsing or blowing off?

This cover secures with a steel-core cable threaded through reinforced metal grommets and tightened by a specially molded winch, creating an even, taut fit around the pool rim. The components are engineered to resist rust and slippage, so the cover stays in place during wind and winter storms.

• Steel-core cable for superior tensile strength
• Reinforced metal grommets spaced for balanced tension
• Molded winch for smooth, reliable tightening
• Even tension reduces sag and water pooling

What maintenance or accessories should I pair with this cover?

Use a pool pillow (sold separately) to prevent water and ice pressure from pushing inward on the cover, and consider water bags or straps to keep edges secure in extreme conditions. Regularly clear heavy snow and accumulated debris to maintain proper tension and avoid tearing.

• Pool pillow recommended to protect against ice expansion
• Water bags or edge straps for extra anchoring
• Remove large debris and heavy snow to avoid sagging
• Inspect grommets and cable annually for wear

How durable is the Sapphire Series compared with standard pool tarps?

The Sapphire Series focuses on longevity and performance: thicker scrim, higher fabric density, and a UV-tested LDPE coating set it apart from basic tarps. That combination extends the cover’s effective life and reduces the chance of failures that lead to costly spring cleanup or repairs.

• Premium materials for longer in-service life
• Stronger seams and edge reinforcement for reliable use
• Engineered fastenings lower the risk of wind damage
• Designed for repeated seasonal use, not single-season disposal

Who is this for: Pool owners with an oval above-ground pool measuring approximately 21 × 41 feet who want a rugged, reusable winterizing cover that resists UV, cold, and wind. It suits homeowners who prefer a higher-quality, low-maintenance closing system and those who plan to use accessories like pool pillows or water bags to maximize protection. Note: the pool pillow pictured is not included and is sold separately; choose complementary winterizing accessories for best results.