sleeping bags
In my current Field and Trek catalogue the Rolling Clouds 750 is £120 and weighs 1567 gms (twice the weight of the Pipedream). As they both go "down" to -3 deg C, it's an easy decision!!! . Also, the packed size of the Pipedream is really small, which is a very important factor for me.
It's the quality of the down and the lightness of the fabric that Alpkit uses which makes the difference in weight and bulk.