In my quiver I have a Quatro Glide for small soft waves. I have it in the "cubed fused cell foam core. An advanced wood sandwich build guarantees for light weight and supreme water resistance." construction at 20 lbs. They also make it in the "pro" construction which is lighter about 17.8 lbs. I have ridden both and the heavier Contruction actually surfs better overall.
Can a SUP be too light? Is a little weight good?
As an older surfer ,lighter the better ,to and from surf !,in the wateri like a moderate weight,as I mostly ride longer boards,for glide ,momentum ect ,and it's often windy with backwash as well,at my local,reef ,lagoon set up,I was lucky enough to score a Gong 8,4 karmen and it was in the era of the lightest build they did in the pro range(thanks Colas for the research and info) that board was great to surf !and it's weight was addictive in the water ,performance wise,probably the best I have surfed shortboard style !but with any build that light they are quite fragile !and for me could over react / be a hand full on the windy / backwash days.IMO,The build quality/weight of the infinity product is spot on,as the Jimmy Lewis boards, both coming from the Kinetic factory this is not a promo for either boards or factory it's my experience over many years and board failures.The eternal request /problem for board manufacturers ,I want the lightest but strongest board you can make,but it has to be inexpensive !
In big waves yes, small waves no.
I agree with Hilly.
The extra weight is great on a longer SUP to assist with the glide. I do prefer a lighter shorter carbon boards on smaller waves as they want to thrown around and surfed harder and more vertical.
Weight can be your friend in either case.
I think a bit of weight helps by creating momentum. momentum holds power through turns, minimises the effect of wind, punches through when heading back out and carries through dead sections.