Model T3, XL? T3 has a large screen window. It is windbreak and waterproof. In winter, sunshine through window, warm and brighten up the tent. Tipi Hot Tent is a activity tent. You can use wood burning stove inside, cook and work comfortably. Floorless design let you in/out free. SIZE & WEIGHT? XL size has 8′ 6 (2.6m) peak height. Large head room and slight steep wall increased comfort and ventilation. Doors is 5’11 (1.8m) height. Let most of campers enter door without bend over. Diameter is 15′ (4.6m). It can room queen size bed. Total weight is 11 lbs (5 kg). MATERIAL? Fabric is Anti-tear polyester. It’s sturdy than normal 210T polyester or nylon. It can resist strong wind and rain. Waterproof rate PU 3000mm. Flame-Resistant Coating fabric passed CPAI-84 test. Althoght it could not avoid spark burn a hole on it, but it save your life when it catch fire. All of seam are taped. Pole is made of AA7075 aluminium alloy. It has been extensively used in aircraft structural parts. All of zipper are brand of YKK. FINE WORK? Fine work, Fine tent. We do our best offer tent of fine workmanship.