The prolight is the thin version in the prolight series. This may not be as lite as the neoAir pad, and may pack down to a bit larger size, but that being said this is an amazing pad if you sleep on your back as I do. I recently used it up in the Tetons and I was amazed at how comfortable this pad is. I do sometimes sleep on my side but when pack size and weight matter, this is my go to pad now for sure. It's super durable and self inflates real quick, if you're like me though and you get into camp late you can always inflate it yourself real quickly say about 20 secs. All in all super pad for the warmer months that packs down real small and provides plenty of comfort at night.