These are likely to be heavy and bendy.
Long ago I saw a Boss mast break....
....afterwards I looked at it and it was clear it was black outpigment with some carbon and mostly glass roughly on-axis and approximately straight, but with comedy wiggles in the fibres. Verdict: OK for making trollies, if you get it free, ut no good at all for making sailing boats.
These may be a bit better, but there was every commercial pressure on Topper to make it cheap, and no commercial pressure on Topper to make it any good at all.
W