I did say 'like' an Instaflater - it's the mechanism I meant. The thermarest pump sack doubles as a stuff sack, so it's not dead weight like the Instaflater. I

I did say 'like' an Instaflater - it's the mechanism I meant. The thermarest pump sack doubles as a stuff sack, so it's not dead weight like the Instaflater. I'm a bike tourer, not a backpacker, so I tend to shave weight when I can drop a pound not an ounce - carrying that isn't a big deal. But yeah, 24oz and R 1 is pretty bad.