The percentage listed on shade cloth refers to the percentage of sunlight and corresponding UV rays that are blocked. Example: 60% shade blocks 60% of the sunlight. 30%- 60% Shade Cloth is great for pond netting and for keeping larger leaves out of swimming pools. For growers, 30% is perfect for protecting your geraniums and chrysanthemums, for example. We have woven shade cloths that include rust-proof metal grommets (usually spaced every 2 feet) and knitted shade cloths that can be cut and won't unravel. Browse our extensive selection for your various needs.