I’ll be reviewing the SOL Escape Pro Bivvy for the next few months so follow along to see how it fairs as part of my sleep kit. In a nutshell the SOL Escape Pro Bivvy is a stand alone 50 F sleeping bag or it will add 15 F warmth to a sleeping bag. It is waterproof but said to be highly breathable. Testing will reveal how it actually performs. To read my initial thoughts please click here.