140 LB / 300 GSM HOT PRESS PAPER - Each Fluid hot press block is made of high alpha cellulose paper and has the look,feel and performance of 100% cotton with archival quality at an affordable price 12 x 12 EASY-BLOCK PAD - Each block contains 15 white sheets of high quality hot press paper with a subtle tooth that allows for a variety of watercolor techniques ACID-FREE ARCHIVAL WATERCOLOR PAPER - Fluid paper is produced at slow speeds by European mill masters with over 400 years of paper making experience that creates a stronger, premium quality paper EASY-BLOCK BINDING - Watercolor artists will love these watercolor paper pads that are bound on 2 sides for easy removal of one sheet at a time. This binding format eliminates the need to stretch or secure the edges with tape FIND YOUR PERFECT SIZE - Fluid watercolor blocks come in 12 artist friendly sizes in cold or hot press surfaces, so there's sure to be one that inspires your creative spirit