A soft to the touch 165GSM(5.82oz) organic cotton flannel King duvet cover perfect for cooler weather. The organic cotton has a cooler feel than polyester due to its natural breathability. Due to it being flannel, it is slightly warmer than sateen would be, though not as warm as fleece. Flannel is also naturally more wrinkle resistant. This duvet cover will be perfect for protecting your comforter. Undyed. Softens further after washing. Machine wash and dry on regular. Add 1/4 cup of vinegar to the load to increase softeness. Fabric is not pre-shrunk and will shrink to the proper size once washed and dried. There is no ties in the duvet cover, but the organic cotton fabric itself, once the comforter is placed inside fully, seems to hold the comforter in perfectly without any sliding. Made in the USA. Ships within 1-2 business days.