Does my horse need a fly sheet?

When summer arrives and the flies come out in force, horse owners face a familiar dilemma: to sheet or not to sheet? Fly sheets have become increasingly popular over the past decade, but they're not the right choice for every horse or every situation.

Let's break down what fly sheets actually do, when they make sense, and how to decide if your horse needs one.

What is a fly sheet and what does it do?

A fly sheet is essentially a lightweight mesh blanket designed to protect your horse from insects and UV rays while allowing airflow to keep them cool. Unlike turnout blankets that provide warmth and weather protection, fly sheets serve a completely different purpose.

Here's what a fly sheet actually does:

• Creates a physical barrier against biting flies, mosquitoes, and gnats

• Blocks UV rays to prevent sunburn (especially important for light-colored horses) and coat bleaching (a concern for dark horses)

• Reduces fly spray needs by providing round-the-clock protection

• Keeps your horse cleaner by shielding them from dust and debris

Fly sheets work best as part of a complete protection system. While they cover the body, your horse's face and eyes remain exposed. That's where fly masks come in. Together, they provide head-to-tail protection during peak insect season.

If you're just starting to explore fly protection options, take a look at the different fly sheets available to understand the range of coverage and features.

5 signs your horse needs a fly sheet

Not every horse needs a fly sheet, but certain conditions make them a smart investment. Here are the main indicators that your horse would benefit from one.

1. Your horse has sweet itch or skin allergies

Sweet itch is an allergic reaction to the saliva of Culicoides midges (tiny biting flies). It causes severe itching, hair loss, and sometimes scarring. Horses with sweet itch often rub themselves raw trying to find relief. A fly sheet with full coverage (including a neck cover and belly wrap) creates a barrier that keeps midges from reaching the skin in the first place.

Other skin allergies triggered by insect bites also respond well to fly sheet protection. If your horse develops bumps, welts, or rashes from bug bites, a sheet can eliminate the problem at the source.

2. Your horse has pink skin or a light-colored coat

Light-colored horses, particularly paints, grays, and appaloosas with pink skin, are prone to sunburn. Just like humans, horses can suffer from painful burns and long-term skin damage from UV exposure. A fly sheet with UV protection acts like sunscreen for your horse's body.

Dark-colored horses face a different UV-related issue: coat bleaching. That rich bay or black coat can turn orange or rust-colored after prolonged sun exposure. A fly sheet preserves the natural color, which matters if you're showing or simply prefer your horse's coat to look its best.

For more on why UV protection matters, read about the importance of UV protection for horses.

3. Your horse is excessively bothered by flies

Some horses are more sensitive to insects than others. Signs that flies are causing significant distress include:

• Constant leg stomping

• Excessive tail swishing

• Pacing or running fence lines

• Head tossing and ear flicking

• Difficulty settling down to graze

When flies drive your horse to distraction, they can't relax, eat properly, or enjoy turnout time. A fly sheet dramatically reduces this irritation.

4. You live in a high-insect-pressure area

Geography matters. If your barn is near water, marshes, wooded areas, or wetlands, your horse faces higher insect pressure. Some regions are simply buggier than others. Horse owners in the southeastern United States, for example, often deal with intense mosquito and gnat populations that make fly sheets almost essential during certain months.

5. Your horse has photosensitivity or eye conditions

Photosensitivity (sun-related skin injury triggered by chemical imbalances, certain plants, or liver disease) affects both pigmented and unpigmented areas. Horses with uveitis or other light-sensitive eye conditions also benefit from reduced UV exposure. While a fly mask protects the eyes and face, a fly sheet completes the protection for the body.

When a fly sheet might not be the right choice

Fly sheets aren't universally beneficial. There are legitimate situations where they might cause more problems than they solve.

Hot and humid climates

In areas with high heat and humidity, fly sheets can cause horses to overheat. Even the most breathable mesh traps some heat against the body. If your horse comes in sweating under their sheet while horses without sheets are comfortable, it's a sign the climate may be too extreme for fly sheet use.

Horses that panic when bugs get trapped

Here's a concern that comes up frequently in horse owner discussions: large flies, deer flies, and horse flies can sometimes get trapped underneath a fly sheet. For most horses, this is a minor annoyance. But some horses panic when they feel buzzing or biting under the sheet, which can lead to dangerous behavior.

If your horse has had this experience or you know they're particularly sensitive, you may need to rely on fly spray and environmental management instead.

Rough on gear or has pasture mates that chew

Fly sheets are lightweight by design, which means they're not as durable as turnout blankets. Horses that are hard on blankets or have pasture mates that like to chew may destroy fly sheets quickly. The investment only makes sense if the sheet can survive your horse's lifestyle.

Poor fit causing rubs and discomfort

A poorly fitted fly sheet can cause rubs, especially at the shoulders, withers, and chest. If you can't achieve a good fit (and some horses are genuinely hard to fit), the sheet may do more harm than good. For guidance on achieving proper fit, check out this resource on troubleshooting common fit problems.

How to choose the right fly sheet for your horse

If you've decided a fly sheet makes sense for your horse, the next step is choosing one that actually works. Here's what to consider.

Mesh type and breathability

Mesh comes in different fineness levels. Finer mesh blocks smaller insects but reduces airflow. Coarser mesh allows better ventilation but may let gnats through. Look for a balance that suits your climate and insect pressure.

UV protection rating

Not all fly sheets offer the same UV protection. Ratings typically range from 50% to 90% or higher. If UV protection is a primary concern (pink skin, coat bleaching), prioritize sheets with higher ratings and verify the percentage rather than assuming all sheets provide equal protection.

Coverage options

Consider what areas need protection:

• Belly bands protect the vulnerable underbelly where flies often congregate

• Neck covers extend protection to the mane and neck (important for sweet itch horses)

• Tail flaps shield the tail head and hindquarters

Fabric durability and features

Standard mesh fly sheets vary in durability. Some materials offer additional benefits:

• Textilene® fabric (used in Kensington fly sheets) provides 73% UV protection while remaining highly breathable. It's also fire retardant, mildew resistant, and designed to withstand fading.

• Ripstop construction prevents small tears from spreading

• Nylon lining at the shoulders and chest reduces rubbing

Learn more about why Textilene® fabric is the powerhouse behind Kensington's horse gear.

Fit considerations

Proper fit is essential. A sheet that's too tight restricts movement and causes rubs. One that's too loose allows flies to enter underneath and may shift or twist during turnout. Look for features like:

• Wither relief pads to prevent rubbing at the mane

• Adjustable chest and belly closures

• Tail straps or loops to keep the sheet in place

If you're considering a Kensington fly sheet, the Horse Protective Fly Sheet with 73% UV Protection offers these features with the durability Textilene® is known for.

Color considerations

Light-colored sheets reflect heat, which can help keep your horse cooler. Some research suggests that patterns (like zebra stripes) may actually confuse flies and reduce landings, though results vary.

Fly sheets and fly masks: Better together

A fly sheet protects your horse's body, but their face and eyes remain exposed. For complete protection, pair a fly sheet with a quality fly mask.

This combination is especially important for horses with:

• Uveitis or eye sensitivity - UV protection around the eyes reduces flare-ups

• Pink skin on the face - prevents sunburn on the muzzle and around the eyes

• Heavy fly pressure - keeps flies away from eyes, ears, and nostrils

The principle is simple: if you need sunglasses outside, your horse probably needs eye protection too.

Kensington's UViator CatchMask Fly Mask with 90% UV Protection combines the functionality of a fly mask with the convenience of a halter, featuring double-locking throat closures that let you lead your horse without removing the mask.

For a complete overview of fly mask options, explore the full fly mask collection. And for more on why fly masks matter, read about why fly masks are a must-have and how Kensington stands out.

Making the decision: A quick assessment checklist

Still unsure? Run through this quick assessment:

Scoring:

• 4+ points: Your horse is a strong candidate for a fly sheet

• 2-3 points: Consider a fly sheet during peak season or for specific situations

• 0-1 points: Your horse likely doesn't need a fly sheet

Protect your horse with the right fly gear

Fly sheets aren't a one-size-fits-all solution, but for the right horse in the right situation, they can greatly improve comfort and health. The key is matching the protection to your horse's specific needs, your climate, and your management situation.

Quality matters when it comes to fly protection. A well-constructed fly sheet with proper UV protection, durable fabric, and a good fit will serve your horse better than a cheap alternative that rubs, tears, or traps heat.

At Kensington, we've spent over 70 years developing protective gear that actually works. Our Textilene® fabric delivers 90% UV blocking with 78% air permeability, addressing the common concern about overheating while providing serious protection. And every product we make is backed by our lifetime guarantee.

Ready to explore your options? Browse our complete fly protection collection to find the right combination of sheets, masks, and boots for your horse.

Frequently Asked Questions

How do I know if my horse is too hot in a fly sheet?

Check for sweating, especially over the withers and along the back. If your horse comes in from turnout with damp hair under the sheet while horses without sheets are dry, the sheet may be trapping too much heat. In hot, humid climates, consider limiting sheet use to early morning and evening hours.

Can I put a fly sheet on a wet horse?

Fly sheets are made of mesh and aren't waterproof, so a horse wearing one in the rain will get wet. While it won't necessarily hurt the horse, a wet sheet hinders the coat's natural evaporation and can cause chilling if temperatures drop. Remove fly sheets before rain when possible.

How do I stop flies from getting under my horse's fly sheet?

Proper fit is key. A well-fitted sheet sits close to the body without gaps. Look for sheets with belly bands or wraps that seal the underside. Some owners also apply fly spray to the sheet itself, which can help deter flies from approaching. However, large horse flies and deer flies can sometimes still get underneath, which is why some horses do better without sheets during peak horse fly season.

What's the difference between a fly sheet and a summer sheet?

Fly sheets are made of open mesh designed specifically for insect protection and airflow. Summer sheets are typically made of solid, lightweight fabric (like cotton or polyester) and are designed to keep horses clean and provide light warmth rather than insect protection. They don't offer the same breathability or bug-blocking capability as mesh fly sheets.

How should I care for my horse's fly sheet?

Regular washing keeps fly sheets effective and comfortable. Remove dirt, sweat, and dead insects that can clog mesh and reduce airflow. Most fly sheets can be machine washed on gentle cycles. Having two sheets allows you to rotate while one is being washed and dried. Store sheets clean and dry to prevent mildew.

Does my horse need a fly sheet at night?

It depends on your situation. Night turnout often means fewer biting flies but more mosquitoes. If mosquitoes are a problem in your area, a fly sheet can provide protection. However, if nights are cool and your horse doesn't need insect protection, letting them go without a sheet gives their skin a chance to breathe.