Cover Truss in Weddings & Marquees. Side Velcro Strip for Easy Installation. For Use with Trio290 Tuss. Illuminate Sleeve with LED Par Can or Effect Light. Trio 290 truss sleeve for a 1m straight. These white sleeves give a clean look and are ideal for wedding and marquee environments. The side Velcro strip allows for easy installation onto your truss- saving time for set up. Add that extra special effect to the sleeve by using a slimline LED par can or effect light within the base area of the truss to illuminate it from within.. TRUSS SOCK