This mid layer from Montane uses a classic blend of Pertex outer material with Primaloft insulation, creating a technical mid layer for a variety of activities. We wouldn’t class the Prism as an on the go layer, even though the materials used are all admirably high performing. There are no stretch panels for improved breathability and insulation isn’t zoned. Although the Prism would be fine to use on the move, we would recommend something more focused for high intensity activity.
For general warming duties through the Prism does the job, it isn’t class leading but the price reflects this. A 40g fill of Primaloft Silver insulation is a good starting point if your climate is generally mild or you don’t want to be weighed down by a heavier fill and this amount makes the Prism an ideal layering jacket for a hit of warmth at the campsite or during rest breaks while hiking.
Overall weight of the Prism is middling at 390g and packed into its own hand pocket it's about the size of a small camping pillow. It isn’t an ultra high-tech, ultralight garment by any means, but it offers a reasonable balance of vital statistics for the money, and you can still happily chuck it in your pack without worrying.
Comfort is generally good, with space and freedom of movement all over while retaining the athletic cut. The hood is particularly neat, with a wired peak and multiple points of adjustment ensuring it stays on your head when the wind is howling.
Cinching the hem down using the drawstring adjusters effectively seals out the cold and the elasticated cuffs further protect from the elements. Combined with the highly windproof Pertex Quantum outer material the Prism is particularly effective in high winds.
Overall a comfortable generalist outdoor jacket which provides warmth as a standalone layer in the spring and summer months or as a layering piece into winter.
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