[ Premium Quality Crystals ] Made of premium quality raw material with further dust treatment, our flower drying crystals are great for preseving flowers, herbs, boutonnieres, corsages, wreaths, seeds, etc. | [ Moisture Indicating ] With 10% orange indicating silica gel that enables users to quickly determine when desiccant needs to be recharged or replaced. (Orange beads changed to dark green). | [ Instruction of rejuvenation] You may rejuvenate the silica gels as instruction, the drying crystals can be reused again when dark green beeds back to orange. (Rejuvenated by Oven: 0.5 to 1 hours at 200F to 250F; Rejuvenated by Microwave: 7 to 10 Minutes at Defrost Mode) | [ Reclosable Package] Reclosable zip top bag(external packing) plus OPP bag(internal packing), very good for delivery and storage. | [ Easy to Use ] Cocl2-free, these products are perfect for beginners to do flower drying DIF craft, very easy and convenient. Warm hint: Please wear gloves and breathing mask if required.