Engineered for strength, the Storm is fashioned from corrosion-resistant aluminum and stainless steel. Its robust structure is designed to withstand the onslaught of nature's fury. Through careful consideration, Woodline has selected and developed the most resilient canopy fabrics to be able to handle whipping winds and scorching sun, while the built-in quattro pulley system of pure stainless steel assures smooth and effortless operation day after day. The pole, joint plates, pulleys, hubs and fittings including the canopy attachment eyelets are all forged from high grade stainless steel.