Features 1. Heat activated color changing yarn - instant response: watch the magic unfold! This innovative yarn changes color tone when exposed to warmth of 77 ° F (25 ° C) - whether by hand, sunlight, or a hair dryer. Very suitable for dynamic crafts that respond to touch and temperature. 2. Soft and durable natural cotton yarn: Made of high-quality natural cotton, this yarn has breathability, strength, and smooth texture - making every crochet or knitting project comfortable and long-lasting. 3. Each strand hides a secret shadow of heat disclosure: watch as the color changes with the release of warmth and hidden tones - turn each crochet or knitting item into a dynamic, interactive creation, unique. 4. Multi functional crochet, knitting, and creative crafts: very suitable for making accessories amigurumi、 Clothing, etc. - whether you are a novice in yarn crafts or an experienced manufacturer. Easy to use, always put your ideas into practice. 5. A gift of interactive creativity for craftsmen: Surprise crocheters, weavers, and DIY enthusiasts, and transform them with their creations. Unique gifts turn each project into a dynamic and unforgettable experience. Specifications: Material: Cotton Weight: 70 g Colors: Green, Purple, Brown, Blue, Pink, Red, Grey Package Include: 1* Temperature Reactive Yarns