Horse Fly Sheets

UV Mesh Fly Sheets for Horses — Insect Defense, Sun Protection & Cool Comfort All Summer

• Breathable mesh construction: Open-weave mesh fabric allows airflow so your horse stays cool even in peak summer heat — not a barrier that bakes.
• UV ray blocking: Mesh panels reduce UV exposure on the coat and skin, helping prevent sun bleaching on dark-coated horses during long turnout hours.
• Full-body insect barrier: Designed to block flies, mosquitoes, gnats, and other biting insects across the barrel, back, and shoulder — reducing skin irritation and stress-related behavior.
• Adjustable belly surcingles: Cross surcingles visible across the underside keep the sheet anchored during movement without rubbing the girth area.
• Wide size range: Available from 66" through 84" to fit ponies, average horses, and larger breeds — trusted by riders across 48 states.
• Western-styled print options: Select sheets feature Aztec and southwestern prints — barn-approved style that holds up to daily wear.

How to Choose the Right Horse Fly Sheet

Fabric Type — Mesh vs. Poly

Mesh fly sheets are the go-to for hot, sunny climates — the open weave lets heat escape while still blocking insects. Poly fly sheets offer a tighter weave that adds a light layer of wind resistance alongside bug protection, making them a practical choice in regions with cooler evenings or stronger breezes. Neither is a turnout blanket — fly sheets are purpose-built for insect and UV defense, not warmth.

Fit & Sizing

Horse sheets are sized by body length measured from the center of the chest to the point of the buttock. A sheet that sits too short will gap at the haunches, leaving skin exposed to insects. Too long and it drags, creating a tripping hazard. Hilason fly sheets run from 66" to 84" — always measure your horse before selecting.

Use Case — Turnout vs. Stall

Fly sheets work in both pasture turnout and stall environments where insects enter through open windows or barn doors. For active turnout horses that roll or move at speed, look for reinforced seams and secure surcingle attachments. Stall-kept horses benefit from the UV blocking on sunny afternoons when direct light enters the barn.

Common Mistakes When Buying a Horse Fly Sheet

The most frequent buyer error is ordering by weight or fill — fly sheets have no fill; they are zero-fill insect and UV barriers, not warmth layers. Confusing a fly sheet with a turnout blanket leads to an overheated horse in summer. The second common mistake is guessing size from breed alone — always tape-measure body length, as horses of the same breed can vary by 6" or more.

Why Fly Sheets and Turnout Blankets Are Not the Same Thing

This distinction matters for your horse's welfare. A fly sheet is an open-mesh or lightweight poly barrier designed purely for warm-weather insect management and UV protection — it adds no meaningful warmth and should never be used as a cold-weather layer. A turnout blanket, by contrast, is a waterproof, filled outer layer built for cold and wet conditions. Putting a blanket on in July or a fly sheet on in January solves the wrong problem entirely. If you need cold-weather coverage, browse the Turnout Blankets collection separately.

Mesh vs. Poly Fly Sheets — Which Is Right for Your Horse?

UV Mesh Fly Sheets

Open-weave mesh construction maximizes airflow, making these the strongest choice for hot summer climates, intense sun exposure, and horses that run warm. The mesh allows sweat to evaporate quickly while creating a physical barrier against flies, mosquitoes, and gnats. Best for: summer turnout in warm-weather states, sun-sensitive horses, and horses prone to sweet itch from biting insects.

Poly Fly Sheets

Poly fabric offers a slightly denser weave, adding modest wind resistance alongside insect defense. Hilason poly fly sheets are crafted from top-grade poly known for durability and light weight. Best for: spring and early fall when temperatures are variable, breezy barn environments, and horses that need a touch more coverage without the bulk of a blanket.

Horse Fly Sheet Questions Answered

Complete your summer horse care setup: browse Fly Masks, Horse Blankets & Sheets, and Horse Supply essentials.