An element-shielding device includes a first rod including a first stake configured for insertion into the ground; a second rod including a second stake configured for insertion into the ground at a distance from the first stake; and a barrier material disposed between the first rod and the second rod. The barrier material is extendable and retractable between the first rod and the second rod. An element-shielding system includes a plurality of element-shielding devices.

A rollout protective cover assembly is configured for removably and temporarily covering a boat. The cover assembly includes a reel, and a flexible cover attached to the reel and having opposing sides and opposing ends. The flexible cover is adapted for being rolled onto the reel in a stowed condition and substantially unrolled from the reel in a deployed condition over the boat. The opposing sides of the flexible cover define symmetrically formed scalloped edges. Each scalloped edge includes a series of longitudinally spaced tie-down projections and a corresponding series of concave ventilation curves formed between adjacent projections.