Summary - barely adequate light weight sleeping mat that is hard to deflate and not very comfortable.
183cm long, 45cm wide and 6cm tall. While only weighing 500gm, it also only offers an R value of 0.7. Not the most comfortable thing, with the 6 lengthwise tubes forming deep crevices in between when inflated. It starts as a 68cm wide mat, but shrinks to 45cm when inflated. It has a one-way value for inflation and the inflation sack doubles as a waterproof storage bag - not as light as the S2S inflation sack, and also not taking in as much air per breath. Deflating was not easy - you need to hold the one-way value in while deflating and air can only pass between the cells at the top and bottom and they tend to bunch up and not allow air to pass. If you are good at Twister, then you should be able to deflate this by holding in the one way value while stretching the mat width-wise and rolling up from the bottom all at once. Would be good as a pool toy too.