The Sea to Summit Comfort Plus Insulated Sleeping Mat in large size combines the technology of Exkin® Platinum fabric and Thermolite® insulation to ensure that you’ll be retaining as much body heat as possible.With independent, high-resolution air cell layers you can adjust the top section while maintaining a firm base. These two crucial designs features ensure you will be not only comfortable, but warm too, without the need for bulky sleeping bags or extra heating. This saves you space in your pack so you can go further and for longer without compromising your comfort. All Sea to Summit sleeping mats come with a repair kit featuring six self-adhesive patches allowing you to repair punctures in the field. They also come with a spare silicone one-way valve flap, all of which can be conveniently stored in the included high quality stuff sack.