Breathable nylon inner helps keep the tent fresh ProTex® 15D 3000mm nylon flysheet silicone/PU coated alpine lt SERIES Part mesh inner door helps ventilation and keeps bugs out Yunan poles pre-angled for effective bracing against wind Dyneema core guylines immense strength-to-weight ratio Flysheet vents with mesh increase ventilation and keep bugs out Gothic Arch Poles on Erebus models ProTex® 15D 3000mm nylon flysheet silicone/PU coated TBS® Pro Dyneema® cord for maxium stability Yunan poles pre-angled for effective bracing against wind 70D nylon, 6000mm HH groundsheet great balance between low weight and high durability