The Beta Light is made of the ultralight SilNylon fabric and weighs only 1 lb. 3 oz. This very lightweight fabric is coated on both sides with silicon which not only waterproofs the fabric, but also adds durability, allowing the fabric to be lighter than other waterproof nylon fabrics. This fabric is waterproof but will require seam sealing with a specialty Sil-Net solution, so we are including a free tube of Sil-Net with the Beta Light. This floorless tent uses two adjustable trekking or ski poles for support which reduces pack weight if you already use poles. If you would rather not sleep on the bare ground, you can get the optional Beta Floor for just an additional 1lb 4oz, still incredibly light for a four-season tent, or just put down a couple of space blankets that usually weigh less than an ounce.