The composition is more useful than the military styling here. The Olive Drab Green Warm Fire Retardant Blanket, 66" x 90" (80% Wool)-US Military Style states 80% wool, which lets you compare a wool blend with all-wool and synthetic alternatives instead of guessing from the photograph.

I'd start with where it will live. Extra bedding in a vehicle and an item carried over a long trail have very different space and weight allowances.

The Main Details

80% wool according to the product title.
66 by 90 inches of listed coverage.
Olive-drab, military-style blanket.
Fire-retardant description, rather than permission to expose it to flames.

The remaining fiber content and care instructions are worth checking. Those can affect how you look after the blanket and whether its washing routine suits the way you'll use it.

Treat the Fire Claim Sensibly

I wouldn't buy this as firefighting equipment or as a reason to sit closer to a campfire. Fire-retardant wording doesn't make any everyday blanket safe for every heat exposure. Follow the specific instructions and keep normal care around heat sources.

Its ordinary job is providing another flat layer. Spread across a seat or used as extra bedding, the size can be handy without requiring you to zip into a bag. You do give up the contained shape that helps a sleeping bag stay around a moving sleeper.

Where It Fits

A home emergency shelf, vehicle, or camp box is where I'd compare it first. Before buying for a backpack, find the actual weight and packed dimensions. Neither is established just by the wool percentage.

The sensible reason to choose this blanket is wanting its stated wool blend and coverage. If light weight, a verified sleeping-temperature rating, or a fitted shape is more important, choose around those requirements instead of the military-style appearance.