Micromesh material keeps insects at bay including aphids, carrot fly, cabbage root fly and other airborne pests. Fits over the Grower Frame (not included) and has four large side zips for easy access. The ultra-fine mesh allows air and water to easily pass through but protects plants from scorching or wind damage. Ideal for taller plants like brassicas and fruit bushes. Measures 9ft 8in (l) x 3ft 3in(w) x 3ft 3in(h). 1 cover per pack.