2' x 6' only weighs 6oz. I read that it will add about 10 degrees to your sleep system. Using it instead of my Nemo Tenslor I will save about 11oz. My base will be around 6 lbs with it. wondering when ultralight becomes ridiculous. Right now I am pretty comfortable at night. My pack is a Osprey exo 38, pad - Telsor 25, Bag is an EE Revelation ( 20 degrees )Tarp - SMD Deschutes plus. I know if I go with the reflectix pad my comfort level will drop. Wondering if 11 oz is worth it. Going to try it on an over night next week