From the Manufacturer:
Weight: 24lb. (90 gsm)
Available in blank pads or lined pads with subtle, non-photo blue dotted lines
25% cotton, acid free
Beautiful 25% cotton writing paper is perfect for calligraphers, hand lettering, and artful correspondence. Available in 2 pad sizes, the natural white, wove finish paper is acid free and is available in both blank and non-photo blue lined options. Pads feature a flipover cover that allows sheets to remove cleanly from. Perfect for a broad range of ink varieties and writing instruments Acid free.