You get a good sense of what it must be like working with sealskin in this wonderful video. I was impressed by how elastic fresh seal skin is, and also how meat-centric the Inuit diet is. I have to question the nutritional value of seal meat. Although they point out that seal meat has 34x the iron of beef and a lot of calcium, excess iron potentiates free-radical oxidative damage and really should be avoided, especially in men, who have no way to excrete of excess iron. And despite the calcium, the Inuit population had and still has the highest hip-fracture rate in the world. This may be because sulfur-containing amino acids in animal protein leach out the calcium from bones, contributing to osteoporosis. Look here for a more detailed discussion of low-carbohydrate, meat-based ("primal", or "paleolithic") diets.