Therm-a-Rest site states that this mattress is:
"Our all-purpose car-camping mattress—now warmer than ever.
° Cushioning: Added thickness for increased comfort.
° Extra-Warm: Solid foam core provides superior warmth.
Uses: General car, family, and base camping."
At 2 inches thick I found it just right for my 59 year old aching back and hips this past summer on the hard ground when I rafted along the Arkansas River and camped through Colorado. My fairly new mattress from another well-known company was just not enough after just a few trips.
********An important note here: Based on manufacturer's instructions, be sure to add your own huff and puff air the first time or two making sure the mattress is fully inflated. After that it may require a few puffs now and then.
Sizes, Weights, Suggested $ as of 10/08 etc.• All are 2 in. (5 cm) thick
• R-Value of 6.2
Regular Size Mattress
• 2 lbs., 12 oz.
• 21 x 5.4 in. (53x14 cm) rolled size
• $64.95 suggested price
Large Size Mattress
• 3 lbs., 10 oz.
• 26 x 5.6 in. (66x14 cm) rolled size
• $74.95 suggested price
X-Large Size Mattress
• 4 lbs., 4 oz.
• 30 x 5.6 in. (76x14 cm) rolled size
• $99.95 suggested price
Reviews from other sitesREI Customer Reviews (and no, I do not work for REI!)