Shires, Performance Fly Sheet Breathable and lightweight Blocks over 90% of the sun's harmful UVA and UVB rays Anti-rub lining on neck, chest, and shoulders Adjustable chest buckle closures Deep shoulder gussets Breathable and lightweight Blocks over 90% of the sun&#039;s harmful UVA and UVB rays Anti-rub lining on neck, chest, and shoulders Adjustable chest buckle closures Deep shoulder gussets Belly flap with three adjustable surcingle straps Large tail flap Adjustable fillet strap