Just like an insulating jacket, a warm hat is gold dust once you have stopped in camp for the night - even in relatively warm months you will chill down without it as the evening sets in. Stick it on in camp and keep it on in your sleeping bag for that little boost of heat where necessary.
The Buff M&P is named for the microfibre outer and polar fleece inner, a dual layer construction that feels amazingly soft and luxurious while really boosting the warmth to weight ratio. It is also low on bulk - a real boon for bikepacking where it can stuff into any nook and cranny of luggage - so is perfect for any high impact activities like running or biking too. We have even used it comfortably under helmets on the bike where it copes admirably in especially cold conditions - a testament to its low profile but high insulation.
In short, this is a seriously lightweight and compact hat for the benefit it brings. Cram it into a pocket and forget it is there until needed. Even after multiple soakings, a quick wring out and it is dry in no time at all.
A Polygiene treatment of silver ions keeps bacteria from multiplying on sweaty noggins, and we are yet to get this little star smelling anything less than fresh and ready for action. It just goes on and on.
We did find it came up a bit small for the 'large of head' amongst us, so if you fall into that category just double check it will fit before you buy.
