Professional's Choice Equisential Fly Sheet Protect your horse from flies! Made of a flexible and durable 280g interlock mesh fabric with extended tail flaps for more protection. Secure velcro and a T-buckle front closure ensure a perfect fit. The criss-cross belly straps are adjustable and snap on and off for ease of use. The hind straps are also adjustable and will help to keep the sheet securely in place.