Thank you for viewing! This is a set of two adzuki bean warmers. You can warm your shoulders, eyes and neck, or abdomen and lower back simultaneously. The center seam prevents the adzuki beans from shifting. Covers are not included. Please adjust the heat with a handkerchief or similar item. Heat in a 600W microwave for about 90 seconds. The warmth lasts for about 20 minutes. Allow at least 4 hours between uses. Can be used approximately 200 times. Size: Approximately 17cm x 8cm Uses approximately 120g of Hokkaido-grown adzuki beans. Fabric: 100% cotton Adzuki bean power: warmth, poor circulation, eye strain, stiff shoulders, lower back pain, fatigue, students preparing for exams, good sleep