This is a lightly used hybrid blanket, which is part turnout sheet, and part fly sheet.  Great for the in between seasons.  The blanket is in very good condition and is size 84".  Below is the description and details from the Horse Education Company (HEC) website.

From HEC:

"A blanket designed for in-between seasons and busy days when you need flexibility in horse comfort.

 

Our debut blanket design features a full removeable neck, tail flap and an exclusive breakaway strap design that ensures the front replaceable straps will break before they do any damage to the blanket itself.

 

An ideal design for days that range from frosty to warm - with the Hybrid Blanket you won't have to panic if you run late unblanketing, as your horse can have ventilation and comfort at both warm and cool temps.

 

Extra wide velcro attachment at chest offers a range of secure fit for a variety of body types within a size. Waterproof cordura with generous leg gussets to provide  comfortable movement in the paddock at any gate. Removeable neck. Waterproof. 600 denier cordura with comfort liner.

 

Available in Navy and Silver with Mahogany Leather Straps and brass finish hardware or in Black and White with Black Leather Straps and nickel finish hardware - both complementary to our line of leather Hybrid Halters.

 

Recommended temp range for an unclipped horse  - mid-30's to upper-50's with comfort."

https://shop.horseeducation.com/products/hybrid-blanket