100% Cotton FEATURES - This sheet is made of 100% cotton, this cozy flannel sheet set features a charming Grey Penguins print in soft and subtle hues to create an enjoyable look. Also provides warmth and a fun style 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 Elastic Fitted Sheet Set: Designed for ultimate convenience, these sheets feature an all-elastic pocket for a snug and secure fit. The fitted sheet comes with a 14" deep pocket to fit mattresses with a height up to 14" and elastic to keep it in place PACKAGE INCLUDES AND MEASUREMENT - 1 Flat Sheet: 108(W) inches x 102(L) inches, 2 King Pillowcases: 20(W) inches x 40(L) inches Each, 1 Fitted Sheet: 78(W) inches x80(L) inches+14 inches depth Easy care: Machine wash cold, tumble dry low. Avoid bleach. Lint is a natural byproduct of the brushing process that enhances softness and comfort. add a half cup of vinegar in the wash to help reduce shedding, which will subside after a few washes