Nuvue, 22", Winter Shrub Cover, Overall Dimensions 22"L x 22"W x 24"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.