Nuvue, 36", Winter Shrub Cover, Overall Dimensions 36"L x 36"W x 40"H, Better Than Burlap, Synthetic Material Will Not Absorb Moisture & Stops Winter Burn, Allows Sunlight To Penetrate, Allows Water To Penetrate & Feed Plants During The Spring & Fall, Air Can Flow Through Material/No Greenhouse Effect, Protects Plants From Heavy Snow Build Up, Collapses For Easy Storage, Spikes Designed To Penetrate Past Frost Line For A Strong Hold, Helps Protect Root Systems Of Non Indigenous Species & Helps Protect The Root Systems Of New Plantings.