The Big Agnes Blowdown Tent Anchor secures your tent to sandy beaches, snowfields, rock outcroppings, and other places where traditional stakes aren't effective. Attach the cord tensioner end to rocks, tree limbs, and heavy objects. You can also fill it with snow, dirt, and sand with its non-skid fabric. The clipped attachment secures it to tent stakeout points and guylines. Includes four tent anchors, each with a reflective guyline.