Above Ground Pool Covers with a laminated polyethylene sheeting makes these winter pool covers great economic winter pool covers. 8 Year Winter Pool Covers with a laminated polyethylene sheeting makes these above ground pool covers with a thick, high-density polyethylene stitching ensures superior tensile strength and durability. All Propools winter pool covers are treated to provide maximum resistance to damaging ultraviolet rays to inhibit deterioration and increase longevity. Our winter pool covers feature a ratchet and cable system featuring high-test vinyl-coated cable, these pool covers are sure to be on come Spring time.