Percale vs sateen is the first decision in sheets, and this set is firmly percale: a plain, tight weave with a dry, crisp surface that stays cool against the skin. If you sleep hot, or you like the hotel feel of a sheet that has a little body to it, this is the construction you want — sateen’s sheen and drape come at the cost of warmth. Four pieces: fitted sheet 60″ x 80″ with a 15-inch pocket, flat sheet 90″ x 102″, two 20″ x 27″ pillowcases. The fitted sheet uses 360° elastic and a sewn-in BOTTOM tag, which sounds minor until you are making the bed at 11pm. Pillowcases close with an envelope flap. Woven from 100% organic cotton. No anti-wrinkle finish, so it will crease — remove promptly from the dryer and steam if you want it sharp. It softens with every wash.