Sinful line Soft Spreader Bar. The Soft Spreader Bar from Sinful Bondage brings comfort and fun to a compromising position. Featuring strong Velcro wrists and ankle cuffs with neoprene padding and an attractive vinyl finish. Safe, durable and easy to use, Sinful’s Soft Spreader Bar is top of the line gear for BDSM beginners and enthusiasts alike. Materials Vinyl, Neoprene.