Anyone tried a Prism and a Flux?
Only tried them on back to back in Go Outdoors, is that the equivalent of the car park test for bikes?
The Flux was noticable warmer and a closer fit, especially on the arms.
I bought the Prism. Last weekend I walked Snowdon wearing it. Just above freezing on the top in the clouds. With a thin long sleeve base layer I was fine when moving. Only time I put anything else on was when we stopped for lunch on the east ridge and I chuck my Paramo jacket over.
I think the Flux would be more suited to lower activity rates and/or lower temps, eg winter climbing.
Don’t have any experince of the Rab Vapour Rise to compare with.
I do tend to run slightly warm and get by with less insulation than some, so YMMV.