This item uses a thermal insulation material, so it can be used in the summer for ice ring pouches, snack pouches, onigiri (rice ball) pouches, and pouch drink pouches. The outer fabric uses regular fabric. I wash it in the washing machine, but I recommend hand washing if you are concerned. Fusible interfacing for pouches is used on the front side. Size: Approximately 21cm x 21cm. A 20cm YKK zipper is used. The zipper color is natural (off-white). The D-ring is antique gold. If you have any questions about the zipper color, D-ring color, etc., please comment before purchasing. m(__)m Two ice rings can fit inside. (The ice rings used for the photo are not included in the product.) This is a handmade item by an amateur. There may be some distortions or double stitching due to the sewing machine. I make each one carefully, but I appreciate your understanding of handmade products. Due to the rise in material costs, the price will be slightly increased from this listing. We do not offer discounts on individual handmade items.