SnugFleece II Mattress Pad (1¾'' pile/60 oz ) Made from 100% American virgin wool, SnugFleece Woolens' products offer superb craftsmanship and a "hands-on" quality that is not found elsewhere. The SnugFleece Original and SnugFleece II mattress covers are constructed one row at a time, through a unique process that secures the wool to a cotton backing in its natural upright position. Because the crimp of the fibers remains intact, it stays lofty and resists compression. For the SnugFleece Deluxe, Elite or Imperial the wool is knitted through a durable polyester backing that allows the added convenience of machine washing. In winter, countless air pockets between wool fibers trap your body heat and keep warm air circulation freely next to your skin. A consistent body temperature keeps you from tossing and turning so you can experience deeper, more restful sleep. Wool sleep products offer complete slumber. In summer, SnugFleece Mattress Pads create a comfortable, dry haven and are ideal for people who tend to sweat during sleep. Wool's absorbent, hollow fibers wick moisture, keeping air next to your skin dry. This reduces body temperature and eliminates that damp, clammy feeling that frequently causes fitful sleep. Sheets remain cool and crisp even on muggy summer nights. This dry sleeping environment discourages the growth of mold and mildew, a plus for people with allergies. A fitted twin or twin extra long sheet is put on top of your SnugFleece wool pad for best comfort. <b>Most SnugFleece Wool Mattress Pads are held in place by a 2" wide elastic corner strap that will fit will fit mattresses up to 18 inches. </b> <b>SnugFleece Wool Mattress Cover Backing and 5 Styles Information:</b> The <b>SnugFleece Original</b> and <b>SnugFleece II</b> have a cotton backing onto which the wool fibers are bonded. These two styles are dry-cleanable. Can also be vacuumed and spot-cleaned to keep in good shape. The <b>Deluxe</b>, <b>Imperial</b>, and <b>Elite</b> have wool fibers knitted through a woven polyester machine washable backing. <b>About the 30-Day Sleep Guarantee:</b> Returns of SnugFleece Wool Mattress Covers must be returned in "like new" condition (you can sleep on them but they cannot be washed or altered in any way to qualify for a refund). Please contact us for an RA # and return instructions. Twin size is 39" x 75". Twin XL is 39" x 80". As one customer said: "I received my Snugfleece mattress cover today and slipped it onto my mattress. It feels great, the amount of wool is way more than I could tell from the pictures so I am very happy about that. I look forward to sleeping on it tonight. Thanks for the great price!!" Brance G.