This is a black fitted stretch sheet for a super king size double waterbed. It will fit waterbeds measuring from 180cm by 200cm, up to beds measuring 200cm by 220cm ( 1.8m x 1.8m 8in up to 1.8m x 1.8m 8in by 1.8m x 1.8m 4in ). A normal fitted sheet has short sides and does not fit properly over the mattress. This sheet has 13inch corner seams and can easily cope with 12inch mattresses. Normal sheets can be forced over a waterbed mattress but will always be stressed and will rip over time -the sides will arch up to reveal the mattress. This sheet will fit perfectly. These sheets are designed for use with both softside and hardside mattresses. The sheet is made of high quality stretch fabric with 97% cotton and 3% elasthan. A waterbed mattress moves constantly when in use. A normal cotton sheet cannot cope with this movement and will not stay in place - it will move up at the sides. These sheets cope perfectly with mattress movement to ensure a peaceful and comfortable night's sleep. This sheet weighs one Kilo and is 97% Cotton. Perspiration cannot be absorbed into waterbed mattresses and so a sheet of this quality helps ensure a dry nights sleep. The product is from the German market leader and so the packaging is in German. The washing instruction symbols are international and as per the UK.