10 & 12 oz - Constructed of single filled cotton duck. Breathable, allows moisture to evaporate and helps prevent rot and rust. Process treated to ensure water resistance. Locked stitched hems with rustproof grommets approximately 3-1/2 ft apart andin each corner. Reinforced corners. Environmentally friendly, biodegradable product. Use to cover and protect machinery, farm equipment, building materials, lumber, steel, tools and boats. Not recommended for "over the road use". It is a sewn cotton that will fray and rip if not tied down properly. Color - Tan. Made in USA.