The RAB Stratosphere has the highest R-value in the review, which makes it usable right into winter conditions, although this does increase the weight. The rounded rectangular shape makes for an excellent sleeping platform. It is a narrow mat but has enlarged outer lengthwise baffles that are designed to keep the user centred. I found that whilst my elbows and my knees sometimes slipped off the mat when turning, the RAB Stratosphere design did help keep me in the middle of the mat when sleeping.

It’s a high-volume mat but I have yet to touch the ground whilst sitting cross-legged or lying sideways. The Stratosphere has thick synthetic fill that insulates well from the ground but does add to bulk. Despite this, the stuffsack measures an impressive 25x14cm. A basic puncture repair patch and an inflation pump sack are included. 

Although the weight is high, this is a great-value and well-designed year-round choice for wild camping and multi-day trips.