100% Cotton FEATURES - WOOLRICH was founded in 1830 for warm outdoor clothes . The WOOLRICH flannel sheets are ultimate sheets to keep you warm and cozy all night and are made of 100% cotton for soft hand feel. This cozy flannel sheet set features a charming plaid print in soft and subtle hues to bring a classic touch to any rooms. Also provides warmth, simple and stylish pattern for your bedroom FLANNEL - It is known for its softness, warmth, and affordability. When it comes to extra warmth, flannel is the clear winner. It also use a GSM weight indicator rather than thread count to measure quality. It uses 160 GSM for more warmth and better quality FIT - With elastic all around, snugly with your mattress. Fits mattress up to 14 inches elastic pocket PACKAGE INCLUDES AND MEASUREMENT -1 Flat Sheet: 108(W) inches x102(L) inches, 2 King Pillowcases: 20(W) inchesx 40(L) inches Each, 1 Fitted Sheet: 72(W) inches x84(L) inches+14 inches pocket depth EASY CARE - Machine wash cold, gentle cycle, and separately. Do not bleach. Tumble dry low, remove promptly. Iron on medium temperature. If there is no free movement in the washer or dryer, use large capacity commercial washer/dryer