If you have a leaner frame, you can wear more clothing and extend the range down a bit. (43 chest) and can fit into this bag just fine with light weight clothing.If you have a bigger body frame, this is not for you. I personally would not use this in colder weather - much below about 55 degrees because it does not allow me to wear extra clothing.
If you are a smaller frame and can wear extra clothing, you can go down a few degrees. This bag is a mummy. That means that it derives some of its warmth value from limiting the air flow inside the bag. Specifications as follows from tag.
Alayer Silver-Dotted Non-woven for warmth. Extra 2000MM PU Coating Water-Proof 100% Nylon Oxford on Rear.87"L, 24" at shoulder, 16 at feet. Weight with stuff sack is 2 lb.
Dimensions with included stuff sack - 17 length. Could be stuffed in a smaller sack I think.
Note: do not store in stuff sack so as to preserve lofting ability. The item "Recon 3 Gen I Sleeping Bag -5°C Military Spec Tactical GREEN" is in sale since Wednesday, September 23, 2020. This item is in the category "Sporting Goods\Outdoor Sports\Camping & Hiking\Outdoor Sleeping Gear\Sleeping Bags". The seller is "garygmbmuff" and is located in Stamford, New York.This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, France, Australia, Russian federation, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.