The TOPSPIN is an all-round freeride boom wing with Dacron airframe for beginner to expert - broad wind range, direct control, ultimate performance. Note: Boom must be purchased separately. Boom sizes: 85cm (2.0m2 - 2.5m2), 108cm (3.0m2 - 4.5m2), 118 cm (5.0m2 - 6.5m2)