I used lambskin condoms 20 years ago before the AIDS issues. The other brand was Fourex, came in a small capsule instead of a packet. All I can say is that there is no comparison between the feel of lambskin condoms & latex or poly. The Fourex felt like you didn't have a condom on. I tried NATURALAMB® brand once and it actually burned. I must have been allergic to the lubricant they used, so I had to give the rest away and can't comment on them other than I couldn't use them.
But if you need condoms for protection from pregnancy and not protection from STDs, give these a try. You may be very pleasantly surprised. BTW, the Fourex lambskin were about 3 times the price of regular condoms, but well worth it. I haven't seen Fourex for quite awhile, bet they 'pulled out' (pun intended) of the US market due to possible liability issues regarding STD protection.
From Consumer Report article on lambskin condoms:
"Skin" condoms are made from a natural pouch in lambs' intestines, and cost several times as much as latex ones. The membrane is especially strong and may enhance sensitivity. The downside: They have small holes. The microscopic pores in "skin" condoms can be up to 1.5 microns across. Since sperm cells are twice as wide as that, skin condoms still make an effective contraceptive. But viruses and some bacteria are far smaller than these pores. Lab work has shown that HIV and the herpes and hepatitis-B viruses can pass through skin condoms. So these condoms must bear a warning that they're not intended for disease prevention.