Hi, i am looking to buy a new bivi bag, i am considering between the Alpkit Hunka and Snugpak, reason being lightweight and small pack size and low price, they seem similar specifications so if anyone has used these bags out in the field and can give a practical comparison of their performance i would be grateful for that advice, i am particulary interested in which has the best breathability (it will be used with a down bag), snugpak offer two types the standard and also the special forces which has a central half-length zip, alpkit offer two sizes of the hunka but as i am only 5'6'' though broad shouldered i imagine i would not need the XL and the standard size should hopefully be okay for myself, specs according to each website are >> weight, hunka 420g, snugpak standard 340g, snugpak specual forces 420g / hydrostatic head, hunka 10,000mm, both snugpak's are 5000mm / breathabilty, hunka 10,000g/m2/24hr, both snugpak's are 7.5 litres/m2/24hr. If their specs are correct the lightest is the standard snugpak and the most waterproof is the alpkit, i don't really understand the breathabilty specs unfortunately. I am replacing a brit army MVP bivi bag because i find it's weight excessive in comparison to lighter alternatives and it's breathabilty poor as i often suffer damp (i never have my head inside and use a small tarp over head but still i get damp inside, on one occasion the damp froze and i had a thin sheet of ice covering inside of bag, sleeping bag is often damp too) i know many love those bags but i have not been impressed with it so any advice as to the performance of the Hunka versus Snugpak appreciated, particulary as to breathability. Thanks.