This product is a type of needle-punched insulated batting or lining specifically designed by The Warm Company for sewing and crafting projects.

Here's a breakdown of what that means:

• Insulated Lining: This material is engineered to create a thermal barrier, effectively reflecting heat or cold back to its source. This helps keep hot items hot and cold items cold.
• Needle-Punched: The manufacturing process involves needle-punching polyester fibers through a reflective metalized polyester film. This creates a breathable, durable material that won't break down or shift with washing.
• By-The-Yard (BTY): This indicates that the product is sold by the linear yard. However, in this specific case, it's a pre-cut bolt or roll rather than being cut to order.
• 22" (inches) X 20yd (yards): This specifies the dimensions of the product. It's a roll of Insul-Bright that is 22 inches wide and 20 yards long. This is a bulk size, often referred to as a "bolt."

Key Features and Uses:

• Material Composition: Primarily consists of hollow polyester fibers (approximately 93.75%) and metalized polyester (approximately 6.25%). The hollow fibers resist heat conduction, while the metalized film reflects radiant energy.
• Thermal Properties: Excellent for maintaining temperature. It's heat-resistant, but NOT heat-proof. For projects involving very hot items (e.g., oven mitts used with pans above 400°F), it's recommended to use two layers or combine it with a layer of cotton batting for added heat absorption and moisture wicking.
• Easy to Use: It's generally easy to cut and sew, and it won't shrink or shift when washed. No pre-washing is necessary.
• Common Applications: Widely used for:
  • Pot holders
  • Oven mitts
  • Casserole carriers/warmers
  • Insulated lunch bags/carriers
  • Tea cozies
  • Placemats and table runners (often with a layer of cotton batting)
  • Draft stoppers
  • Window insulation/drapery lining
• Important Considerations:
  • Not for Microwave Use: Due to the metalized film, Insul-Bright is not safe for microwave ovens.
  • Sound: The metalized film can create a slight crinkling sound, which is generally not an issue for most projects but might be noticeable in clothing. Interestingly, this sound can be attractive to babies and animals, making it suitable for soft books or toys.