The Foundation of Every Molly Mutt Bed — The Stuff Sack

The Molly Mutt Stuff Sack is the clever, patented inner liner that transforms old household linens into a perfectly shaped, structured dog bed mattress. Fill it with old blankets, towels, pillows, or sheets, slip it inside any Molly Mutt Duvet cover, and you’ve got a custom, comfortable bed your dog will love — made from things you already own.

Made from 100% nylon mesh with a zippered closure, it’s breathable, durable, and machine washable — wash the entire sack with the contents inside.

Key Features:

• Patented Design: USPN 8,342,126 & 9,060,494 — the original and best dog bed liner system
• 100% Nylon Mesh: Breathable and durable construction
• Zippered Closure: Easy to fill, empty, and refill
• Machine Washable: Wash the entire sack with contents inside — no unpacking needed
• Maintains Bed Shape: Gusseted design keeps stuffing organized and structured inside the duvet
• Eco-Friendly: Repurpose old linens instead of buying new fill

Available Sizes:

• Medium/Large: Fits medium to large breed dogs
• Huge: Perfect for extra-large breeds

Build Your Complete Molly Mutt Bed:

• Classic Setup: Fill this Stuff Sack with old blankets, towels, or sheets, then slip inside any Molly Mutt Duvet
• Premium Comfort: Use our natural Wool Bed Insert inside this Stuff Sack for temperature-regulating, odor-resistant comfort, then add a Duvet
• Custom Combo: Combine the Wool Insert with additional linens for extra cushioning and support

We carry the complete Molly Mutt collection — Wool Bed Insert and designer Duvet covers sold separately.