The Metabug waterproof fly rug offers a high level of protection against biting insects and keeps the horse dry during rain showers. Being a summer rug, the lower sides are made from fabric with an open knit, designed to be impenetrable to insects yet highly air permeable and heat dispersing as well as quick drying, helping to keep the horse comfortable during changeable warm weather. Further features: waterproof and breathable, 600 denier ripstop upper fabric, neck cover, adjustable cross surcingles, twin chest straps, tail flap, fillet string. Upper woven fabric blocks 90% harmful UV rays. Effectiveness may diminish over time