Ostrich Boots feel like a sock with a sole. The large quill marks are from the quill feathers removed for wedding pens, hat plumes, and such. Because of the size of the remaining pore, these boots are extremely breathable. (And therefore, comfortable for sweaty feet.) The skins are soft and conform to your foot like a sock does. Again, expect a little slippage in the heel when you wear them. And, a nice handshake in the front of the boot. This will let you know that the boot will break in properly, and be most comfortable. The slipping allows air to pump around your foot while moving, and keeps air circulating better than any lace-up style. 

Smooth Ostrich gives you the same softness as full quill ostrich, but without such distinctive texture. Smaller pores have a little less air flow, still, more than cowhides.