PURE & NATURAL Lilypad Lake sources the finest New Zealand wool for our blocking mats. You won't find any polyester filler here, just 100% lamb's wool felt for a superior product. The surface is smooth and ready to use as soon as you open the package. SAVE TIME Tired of flipping fabric swatches and clothes over and over while you iron? Use a flat iron mat to cut that time in half. Wool holds onto the heat from your iron (or travel iron) so well that it essentially irons your clothing from both sides at once! EASY TO USE Set your iron to wool or medium for best results. If it needs to be cleaned, rinse in your sink then hang it up to dry (never use a washing or drying machine). Store flat, don't roll or fold. Safe to use with or without steam. NON-SLIP SURFACE Iron, block, stretch, and press with ease on our tabletop ironing board! Because the wool fibers gently grip your fabric, you'll never need to risk burning your fingers to hold your quilting squares in place so they won't slip!