Well, I was out today again in conditions similar to last week. Again, according to MWIS windchill was -18. And pace Pete, after I had stopped (too long) for lunch at the Glas Maol cairn and started walking again in the stiffened wind, I was indeed cold for a while, even though I had put on a Fuera smock and a Rab Generator vest over the Velez smock, the wind was quite brutal by then and I was getting covered in icy snow powder and it's always amazing how quickly one gets chilly in those conditions (I mean, when you go back into the wind after a stop). I had the TN superlight bothy-bag but didnae bother take it out for my lunch. That's for wusses, I thought. Aye right. But on the way up I was never cold in the Velez + Explorer combo. And Martin's right about having the right trousers (Aspira sallies today). And a hat is a must too (cold feet, cover you head, that sort of thing).