Fly Sheets

A fly sheet is a lightweight mesh blanket designed to cover your horse's body while allowing air circulation and visibility. Unlike traditional blankets that are heavy and insulated, fly sheets are made of open mesh that lets air flow through while the small openings keep biting insects off your horse's skin. Think of it as a physical barrier against flies that lets your horse stay cool and comfortable while providing complete body protection from insects that otherwise would bite everywhere except the legs.

Fly sheets serve a different purpose than fly masks. While masks protect the face and ears, fly sheets handle the body, neck, and shoulder area. Together, a mask and sheet provide complete protection from flies and insects. Many horse owners use both, especially during peak fly season or for horses particularly sensitive to bites. A sheet alone can protect the vulnerable areas on the back and sides where many flies focus their attacks, which makes a significant difference in your horse's comfort even if you're not using a full setup with a mask.

The mesh construction is critical to understanding why fly sheets work. The material is woven tightly enough to keep insects out but loosely enough to allow sweat and moisture to evaporate, and for air to flow through. This is completely different from a solid blanket that would trap heat and moisture. Your horse wearing a fly sheet in summer is actually cooler than wearing nothing because the sheet provides shade while still allowing air movement. This is why horses often tolerate fly sheets surprisingly well, even in warm weather.

Fly sheets come in various styles and coverage options. Some are simple contoured sheets that cover the body and neck. Others have additional components including a hood that connects to the body piece for extended protection over the shoulders and neck, and some have tail covers. More basic sheets cover the essentials—the back, sides, and haunches. More comprehensive setups offer near-complete body coverage. Your choice depends on where your horse gets bitten most severely and how much protection you want to provide.

Like fly masks, fly sheets require proper fit to be effective. A sheet that doesn't fit well will shift, rub, or allow gaps where insects can access your horse. Getting the right size in the right style for your horse's body shape ensures the sheet stays in place and provides consistent protection. Understanding fit, materials, and options helps you choose a sheet that your horse will tolerate and that will actually protect them rather than create new problems.

Fly bites on the body cause the same problems they cause on the face—irritation, welts, potential infection, and constant discomfort that affects your horse's behavior and wellbeing. Horses bitten heavily on the back and sides often develop raw spots from their own efforts to scratch and rub against things trying to relieve itching. These areas are easily infected, especially in hot, humid, or sweaty conditions. A fly sheet prevents bites from happening in the first place, which means no raw spots and no infection risk. For horses with sensitive skin or those prone to dermatitis, body protection is essential.

The stress factor cannot be overstated. A horse tormented by biting insects on their body is constantly uncomfortable. They can't stand still, they won't settle to graze, and they're irritable when being handled. This stress affects their overall wellbeing, their behavior under saddle, and their ability to relax. Removing this source of constant annoyance through a fly sheet transforms how your horse feels and acts. You get a calmer, happier, more cooperative horse simply by eliminating the flies biting them.

From a work and training perspective, a horse comfortable enough to stand still and focus on their job is vastly easier to work with than one constantly fighting off insects. If you're riding during fly season, a well-fitted fly sheet makes a tremendous difference in your horse's ability to concentrate and cooperate. A horse without fly bites is more responsive, more relaxed, and more pleasant to ride than one spending mental energy on the discomfort of fly attacks.

Fly sheets also extend your turnout time. Horses that would otherwise refuse to stay outside during peak fly hours because of the torment will happily graze all day when protected by a good sheet. This increased turnout time benefits your horse physically and mentally. They get more exercise, more grazing, more fresh air and sunlight, and more time engaging in natural behaviors. These benefits compound over time in terms of your horse's health and attitude.

Protecting the body with a fly sheet also reduces your reliance on chemical fly sprays for full-body coverage. While you might still spray legs and face, a sheet handles most of the body, reducing chemical exposure and the toxicity load on your horse. This is particularly valuable if you're concerned about the long-term effects of repeated chemical application or if your horse has sensitivities to insecticides.

Putting a fly sheet on your horse is similar to putting on any light blanket, though fly sheets are much easier and quicker than heavier blankets. Start with your horse standing calmly in a halter and ideally cross-tied. Have your sheet ready and settled so you're not fumbling with it. Approach from your horse's left side, which is the standard mounting side and where they're most comfortable with equipment being approached.

Gather the sheet so it's organized and not tangled. You'll throw it over your horse's back from left to right, similar to putting on a regular blanket. The front of the sheet should rest across your horse's shoulders and withers while you secure the back components. Work quickly but gently. Once the sheet is in the general position, stand back and check alignment. The sheet should sit level across the withers and back, not tilted or bunched to one side.

Secure the front straps, typically at the chest, first. These straps should be snug enough to prevent the sheet from sliding back but not so tight that they restrict movement or create pressure. You want to fit one or two fingers under the chest straps for proper tension. Then secure the belly straps if your sheet has them. These go under the belly and prevent the sheet from shifting side to side. Adjust tension on belly straps the same way—snug but not restrictive. Finally, secure the back straps if your sheet has them. Some sheets cross-buckle at the haunches for additional stability.

The entire process should take ten to fifteen minutes once you're experienced with putting on your particular sheet. First time you put on a new style might take a bit longer while you're learning the system. The key is working methodically, not rushing, and checking fit as you go. Make sure the sheet isn't creating pressure points, bunching, or gaps where insects could get underneath.

Removing the sheet is equally straightforward but requires care. Unbuckle straps in reverse order—start at the back, then belly, then chest. Slide the sheet gently off your horse's back and down. Don't jerk it or pull roughly. Some horses are more sensitive to having things removed than put on, so handle it gently. Once off, check your horse's skin for any rubs, pressure marks, or irritation. If you see anything concerning, you have a fit issue to address before putting the sheet back on.

Like fly masks, some horses need gradual introduction to wearing a fly sheet. If your horse resists or seems stressed, start with short wearing sessions in a safe area like a stall. Increase duration gradually as your horse becomes comfortable. Patience during introduction means you'll end up with a horse that accepts the sheet without stress. Rushing this process creates negative associations that take time to overcome.

Your primary supply is the fly sheet itself, and like fly masks, fit is absolutely critical. Fly sheets come in sizes typically ranging from forty-eight inches to seventy-two inches or more, measured along the horse's back from the center of the withers to the tail head. Measure your horse properly using the manufacturer's guidelines rather than guessing. A sheet that's too small will be uncomfortable and restrict movement. One that's too large will shift and won't provide proper coverage. Many people go down to a local tack shop and have someone measure their horse to ensure correct size.

Material quality matters for durability and your horse's comfort. Higher-quality mesh is more durable, resists UV degradation, and typically stays cleaner and lasts longer. Cheap sheets sometimes become brittle or develop tears quickly. The straps should be sturdy—velcro or buckle systems that hold reliably and don't fail. Check strap quality carefully before buying because a sheet with weak straps won't stay in place no matter how well it fits otherwise.

Consider sheet features that suit your horse and situation. Some sheets include a separate hood that provides neck and shoulder coverage. Some have tail covers. Some have reinforced areas at high-wear points like the withers. Some are designed to work well with saddles if you plan to ride. Think about your actual use and choose features that match your needs. A full coverage setup with hood and tail cover costs more but provides maximum protection. A basic sheet costs less but covers only essential areas.

UV protection in fly sheet material is worth considering if you're in bright sunny areas. Some sheets are treated to block UV rays, which reduces fading and can extend material life. They may also be easier on your horse's eyes during extremely bright days. This is a nice-to-have feature rather than essential, but it's worth considering if available.

Supplemental supplies are minimal. You'll want a place to store and hang the sheet where it stays clean and dry. Fly sheets need regular cleaning—dust and sweat accumulate on the mesh. A wash rack or hose is useful for rinsing the sheet. Mild soap and water clean it thoroughly. Make sure it dries completely before storing it to prevent mildew. Some people keep two sheets so one can be in use while the other is drying.

You might want a simple halter that works well with your fly sheet. Some halters create bulky areas under sheets that can cause pressure points. A simple leather halter is often the best choice if you're putting a sheet on a haltered horse. If you're turning your horse out with the sheet on continuously, test your halter and sheet combination to make sure they work together without creating problems.

Fly sheets are used during fly season, typically late spring through early fall depending on your climate. Watch your horse for signs that flies are becoming a problem on their body—bites, rubbing, restlessness, or behavioral changes all indicate it's time to deploy the sheet. The exact timing varies by location, but generally, if flies are bothering the face, they're also bothering the body, so deploying both masks and sheets at the same time makes sense.

Timing during the day depends on your turnout schedule and how bad fly pressure is. During peak fly hours—usually mid-morning through late afternoon—fly pressure is most intense, so sheets provide maximum benefit during these times. Some people put sheets on only during peak hours and remove them during early morning and evening when fly pressure is lower. Others leave sheets on during most of the day. If your horse is grazing peacefully in early morning with minimal fly pressure, you don't need the sheet on. If they're being tormented at noon, the sheet definitely should be in place.

Consider removing sheets during nighttime hours unless you're in an area with significant night-flying insect problems. Most fly pressure comes from daytime-active insects, so evening and night removal allows skin to breathe and dry completely. A sheet left on overnight can trap moisture and sweat, creating conditions for skin irritation. Remove it, let your horse's skin dry, and put it back on in the morning.

For horses turned out in a group, you need to consider whether the sheet will hold up to pasture play. Horses playing or running together can catch and tear sheets, or the equipment can shift during activity. A durable sheet can handle moderate play, but rough horses or a group playing aggressively might need sheets removed during their most active time. This requires judgment based on your specific horses and situation.

Seasonal adjustments happen naturally as fly season progresses. Peak protection is needed during the height of summer when flies are most aggressive. As you move into late summer and fall, fly pressure typically declines, and you may need sheets less frequently. By November in most climates, flies are minimal, and you can phase out sheet use. Be prepared to adjust your schedule based on actual fly activity in your area rather than following a rigid calendar.

Cleaning frequency should increase during heavy use. A sheet that accumulates sweat and dust becomes uncomfortable and doesn't provide air circulation as well. During peak fly season when your horse is wearing the sheet most of the day, wash it weekly or as needed. A clean sheet is more comfortable and lasts longer. Plan for this maintenance in your routine rather than letting sheets get crusted with sweat and debris.

A horse that constantly shakes off or resists a fly sheet usually has a fit issue. Check alignment carefully—the sheet should sit level across the back and not be bunched on one side. Make sure straps are secure but not so tight they create pressure. Pressure points at the withers, chest, or flanks cause horses to resist. Identify the problem area by looking for rubs or marks on the skin, then adjust the sheet fit or add padding as needed. Sometimes moving straps a few inches creates the difference between a sheet a horse rejects and one they accept.

Rubs or sores where the sheet contacts the skin usually indicate either poor fit or dirty sheet material rubbing. Make sure the sheet is clean before putting it on—dirt and debris accelerate rubbing. If clean and rubs persist, adjust fit. You can add athletic tape or moleskin to high-friction areas to reduce rubbing, though addressing the underlying fit issue is better. Check for rubs immediately and adjust before they become wounds or infections.

If the sheet constantly shifts or won't stay in place, check that all straps are properly secured and that you're using the correct size. A sheet that's too large will shift. Straps that aren't tight enough will allow movement. Make sure you're buckling or velcroing everything correctly. If it still shifts, you may need a different style of sheet—some designs are more stable on certain body types than others.

For horses that are head-shy or resistant to any equipment, introduce the sheet gradually. Let them see it, smell it, and wear it in the stall for short periods before expecting them to accept it during turnout. Some horses that seem resistant at first become completely comfortable with sheets once they realize the benefit of not being bitten. Patience during introduction pays off with a horse that accepts the sheet without stress.

If you're combining sheets with fly masks, ensure both fit properly and don't create conflicts. The chest strap of the sheet should sit below where a mask would sit. There shouldn't be pressure point conflicts between the two pieces of equipment. Try both on your horse and check comfort with both in place before relying on the combination during turnout.

Remember that sheets require regular inspection and maintenance. Check before each use for tears, strap damage, or other problems. A damaged sheet won't provide proper protection and can create new problems like catching hooves or rubbing. Repair tears or replace damaged equipment promptly. Well-maintained sheets last multiple seasons. Neglected sheets deteriorate quickly.

Sheets combined with other fly control methods create the best results. A sheet handles body protection while a mask protects the face. Fly spray on exposed areas like legs completes the system. Fly predators working at the population level further reduce fly pressure. This layered approach is more effective than any single method alone.