Finn MB-1G Mainsail


The MB-1G Light/Medium “Gold medal winning” mainsail comes a little flatter than the LMMNX-1, carrying a lower luff curve percentage but with the same broad seam shaping. Manufactured using the same panel layout as the LMMNX-1 and from North Sails’ own NLXi Technora laminates, this a full radial construction sail offers a light weight feel with great strength and low stretch. See our sail selector chart to match our sails to your mast and weight.

View sail selection charts


Standard Features

  • Class insignia
  • Sail numbers
  • Vision windows
  • Epoxy battens
  • Elastic batten pockets
  • Leech tell tales
  • Trim tale tales
  • Leech line
  • 7mm luff rope
  • Long roll bag
  • WS in-house measurement
  • Class royalty label


  • Carbon battens
  • Carbon headboard
  • Stick-on pockets
  • Adjustable elasticated luff
  • Country flag

Class Experts

Finn MB-1G Mainsail headshot

Derek Scott

Auckland, New Zealand – Sales Office
Auckland, New Zealand – Sail Loft