100% Cotton ALL SEASONS WARMTH COMFORTER - This Martha Stewart down comforter is filled with exceptional white down cluster which has high up to 600 fill power to keep you warm with any weight. This will make you feel like you are in a 5-star hotel room every single day. Good for year-round use. PREMIUM MATERIAL - Martha Stewart Duvet Insert is made from 300TC 100% cotton fabric that is breathable, durable and soft to the touch, and is filled with 75% white down and 25% white feathers. Our unique FreshLoft cleaning process makes the down and feathers hypoallergenic. So The premium fillings are all passed the RDS, OEKO-TEX certified. EXQUISITE DESIGN - The Baffle Box design keeps the down evenly in place for maximum loft and to eliminate cold spots. The duvet has 4 corner loops which are very handy for attaching a duvet cover and anchoring the down comforter to prevent it from moving. FIND YOUR PERFECT ONE - Martha Stewart white down feather duvet is lightweight but keeps warm for all seasons. 3 Sizes are offered: Twin-68"*90" filled with 26oz ; Full/Queen-90"*90" filled with 34oz ; King-106 "*90" filled with 40.5oz. USAGE CARE - When taking it off the packaging, please gently tap and allow the comforter to sit for a few moments to restore its original shape. Spot clean or DRY CLEAN if necessary.